176.turn ... into ... 把变成
If we cut down forests, well turn the land into a desert.
177.turn off 关掉 水、电、收音机
Before you leave the lab, make sure the electricity is turned off在您离开实验室之前，确定电被关闭。
178.turn out 证明是、结果是
Hopefully tomorrow will turn out fine.
179.turn up 到达、出现
At around a quarter past eleven their father turned up.
180.turn over 翻动、耕翻
The soil should also be turned over so that the weeds would be destroyed.
181.work out 算出、解决
He worked out just how much the cost would be.
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