第1个回答 2015-03-29
on one hand,car is useful for us ,on the other hands,it can make pollution
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第2个回答 2015-03-29
one way ,cars are useful ,on the contrary, they can cause much pollution.
这里用on the contrary(相反的是,转折关系使用)而不是on the one hand onthe other hand(一方面另一方面,递进关系使用)因为这里的两个方面是相反的。是转折关系,而不是递进关系
第3个回答 2015-03-29
On the one hand cars are useful,on the other hand they can cause pollution.
第4个回答 2015-03-29
On one hand,car is useful;the other hand,it will causes pollution
第5个回答 2015-03-29
One the hand, cars are helpful, on the other hand, they can also cause pollution.