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【题目要求】
100 years ago, human race believed we would make continue progress in all areas of life. Today, some people feel less certain about this. what areas of progress human race has made? What else areas we haven't developed?
【点评一】
本题是2009年5月21日的话题，属于抽象类话题。抽象类话题看似难写，实际上只要转换成具体话题就容易手了。进步的领域：科技，教育。仍需改进的领域：环保，犯罪，人口老龄化，动物保护，文化语言保护。本题几乎无所不包，雅思写作题库中几乎所有话题都能用于本题。
【点评二】
题目 Some people think the human race has made continual progress in all areas of life, while others believe that there is less certainty about this. What areas of progress human race has made? What else areas we have not developed?
一些人认为人类在各方面已经取得了不断的进步，而另外一些人认为并非如此。人类在哪些领域取得了进步？哪些领域没有取得发展？
开头段 How to make a better life never fails to capture people’s attention throughout much of the human history ,which serves as a catalyst for the continuing development in every aspect of life. Some people, however, believe that the so called “development” cannot be regarded as real progress.
中间段1 回答第一问：人类在哪些领域取得了进步？ 1. 众所周知，几个世纪以来，人类一直致力于通过发展科技来改善生存环境。
It is commonly believed that human beings have been striking for improving living conditions by evolving science and technology for many centuries.
【论证示范】
Due to the convenient transportation system, citizens in China are able to enjoy fresh American lemons which were once not available to Chinese or people in many other counties. Communication modes mainly relied on writing letters in the past also witnessed a significantly transformation with the advent of internet, making friends or families enable to contact each other instantly by their computers or tablets.2.其次，与过去相比，人类在医学领域取得了许多突破。
Furthermore, compared with the past , there are many breakthroughs having been achieved in medical care.
中间段2 回答第二问：哪些领域没有取得发展？ 1. 污染，全球变暖，物种灭绝等环境问题已经成为很多国家头痛的问题，它们经常会陷于经济发展和生态平衡的困境中。
Environmental problems in terms of pollutions, global warming ,species extinction and so forth, have been a great headache to most nations who always trap into a dilemma between economic development and ecological balance. 2.各个种族和宗教间的武装冲突是一个持续性的问题，这对世界的和平与和谐造成了威胁。
Arm conflict among various races and religions is another endless problem posing a large threat to world peace and harmony.
结尾段 To sum up, although a lack of knowledge concerning how to control human desire seems to be a big handicap to human civilization, it should be admitted that we have made a great progress in many fields , and the advancement is expected to continue.
文章词汇表达丰富，学术词汇积累做的也很棒；丰富从句的使用，文章会更出色；文章结构不够严谨，应增加过程性词汇的使用；请注意分段。
Wheat grass is a plant widely cultivated in the world, second only to its production of corn is an important food crop. Wheat is one of China's major grain crops, but due to the monsoon climate and water shortages, drought has become a major abiotic stress limiting factor for wheat production in China. The assimilation of wheat grain has two main sources. Part from before the flowering stage synthesis of non-structural carbohydrates, these non-structural carbohydrate reserves before flowering leaves and stems after flowering to grain transshipment gradually. Another part comes from photosynthesis after anthesis assimilates synthesized. Grain filling stage water deficit easily lead to decreased photosynthetic ability to inhibit the contract after flowering light synthetic compounds, and also affected the flowers before assimilates to grain in transit, reducing grain yield. Previous tests proved that after flowering ear of wheat and other non-leaf organs on the grain filling an important contribution to drought conditions, ear assimilates the contribution rate on grain yield upward trend. And the non-leaf organs is relatively insensitive to moisture deficit is under drought conditions during grain filling an important source of light compounds contract. SPIKE has received light and CO2 space superiority, and has strong osmotic adjustment ability and high potential, in dry conditions still remain relatively high photosynthetic rate. Wheat flag leaf photosynthesis began to decline after flowering, filling stage flag leaf photosynthetic rate is almost zero, rather than leaf chlorophyll content of organs and tissues is relatively slow decline in the filling stage still has a certain degree of photosynthesis. Ear organs can also be re-fixed grain respiration release of CO2, a significant spike photosynthetic physiological advantage. Ear photosynthetic rate decreased slowly after flowering, flowering after 10d stabilized, non-leaf organs on yield contribution rate of 70% -80%. Maydup study found that normal water conditions, ear photosynthesis to grain contribution rate of 13% -30%, drought conditions, the contribution rate increased to 22% -45%. SPIKE photosynthesis possible to maintain production in the face of adversity environment play a buffer role. Compared with the flag leaf, small wheat photosynthesis environment has stronger resistance to drought, water shortage conditions on grain yield contribution can not be ignored. In addition, small wheat and grain close proximity of contact between the two have bundle helps spike assimilates to grain transportation. Spike's contribution in grain filling is particularly important. Research SPIKE light on water use and transport of compounds contract law, to fully tap the light wheat contract capabilities, help to improve the yield of wheat under drought conditions, to ensure the safety of agricultural significance
