Working the land(Periods 1　Warming up and Reading)

6.modern agriculturefor thousands of years traditional agriculture in china did not change very much.most farms were one-family businesses.although china is a very big country,only 7% of the land can be used for farming.it is on this arable land that the farmers produce food for the whole population of china.��it is from the early 1990s that scientists started to develop new techniques to increase agricultural production without harming the environment.chemical fertilization,for example,helps to produce better crops,but is harmful to the environment.new techniques should increase agricultural production but also be friendly to environment.future agriculture should depend on high technology as well as traditional methods.not only food production is important but also taking care of the environment.��the biggest problem of chinese farmers is the shortage of arable land.using the latest technologies,chinese scientists grow vegetables in greenhouses.the roots of these vegetables are not planted in earth but hang in water that contains all the nutrients they need to grow.today,many vegetables are not grown in gardens but in greenhouses.they are protected from the wind,rain and insects.the temperature is controlled with computers,or kept the same,no matter how the weather is outside.��language points��1.dr yuan grows what is called super hybrid rice.�ピ�博士種植了被人稱作超級雜交水稻的稻谷。��what=the thing(s) that��this special strain of rice makes it possible to produce one-third more of the crop in the same fields.�ミ@種特殊的稻種使得同樣的田地多收獲三分之一的產量。��it 在句中作形式賓語,真正的賓語為to produce...,結構為:動詞（make,feel,think,regard...）+it +adj.+ to do。��e.g.we think it important to learn english well.2.since then,he has devoted his life to finding ways to grow more and more rice.��從那以后,他就把畢生精力投入到水稻高產的研究中。��devote oneself to+n./doing 獻身于,致力于�プ⒁�:to 為介詞,后面接v.-ing。類似的短語還有look forward to,listen to,get to,reply to,apologize to,belong to,agree to等等。3.dr yuan searched for a way to increase rice harvest without expanding the area of fields.袁博士尋求一種在不擴大種植面積的情況下提高水稻產量的方法。�プ⒁�:search強調搜查,一般表示目標明確范圍較小。search sb.搜身;search some place 搜查某地search for 強調尋找,一般表示范圍較大。��search for sb.尋找某人��e.g.the police searched the woods for the lost child.�ゾ�察在樹林里尋找失蹤的小孩。��scientists are still searching for a cure to the common cold.�タ茖W家們仍然在尋找普通感冒的治療方法。