1.most americans would find it hard to think what life 2.would look like without a car .but,some have realized 3.the serious question of the pollution caused by the car .4.the polluted air becomes harmful and dangerous to health .5.one way to getting
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1.most americans would find it hard to think what life 2.would look like without a car .but,some have realized 3.the serious question of the pollution caused by the car .4.the polluted air becomes harmful and dangerous to health .5.one way to getting
1.most americans would find it hard to think what life
2.would look like without a car .but,some have realized
3.the serious question of the pollution caused by the car .
4.the polluted air becomes harmful and dangerous to health .
5.one way to getting rid of the polluted air is to build a
6.car that does not pollute .that is how several of the
7.large car factories have been tried to do .but to build a clean car is more easier said than done .
1.most americans would find it hard to think what life 2.would look like without a car .but,some have realized 3.the serious question of the pollution caused by the car .4.the polluted air becomes harmful and dangerous to health .5.one way to getting
1. Americans
2.but,改成 but
3. question 改成 problem
4. 一下子看不出来：）
5. getting 改成 get
6. how 改成 what
7.tried 改成 trying