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1·Police attempted to turn back.

警察试图往回走。《柯林斯英汉双解大词典》

2·The weather got so bad that we had to turn back.

天气变得非常恶劣，我们不得不循原路折回。《牛津词典》

3·The weather became so bad that they had to turn back.

天气变得非常恶劣，他们不得不循原路折回。《牛津词典》

4·It does not matter, thought she, when we turn back, I shall be so much nearer home than he.

“没关系。”她想，“等我们往回走的时候，我离家就会比他更近了。”

5·Suddenly a voice cried: Turn back, turn back, young maiden fair, Linger not in this murderers' lair.

突然一个声音喊道：“回头，回头，美丽的少女，不要在这个凶手的巢穴里逗留。”

6·His group was forced to turn back and take an alternate route.

他的小组被迫返回并采用了替代路线。《柯林斯英汉双解大词典》

7·It was too late to turn back.

要回头，为时已晚。《柯林斯英汉双解大词典》

8·The Senate has now endorsed the bill and can't turn back.

参议院现已同意了该议案，无法回头了。《柯林斯英汉双解大词典》

9·The liquid is maintained above its melting point until steam is required, at which point the liquid is allowed to turn back into a solid, releasing its stored energy.

不需要蒸汽时，液体保持在熔点以上，需要蒸汽时液体才能变成固体，释放其储存的能量。

10·The liquid is maintained above its melting point until steam is required at which point the liquid is allowed to turn back into a solid releasing its stored energy.

液体保持在其熔点以上，直到需要蒸汽时才可以变回固体，释放其储存的能量。