Notice that the major part of the swap time is transfer time .
注意,交换时间的主要部分是移动时间。
Then we would need to swap only what is actually used , reducing swap time .
我们只要交换实际上使用的,以减少交换时间。
They want kids to swap at least 30 minutes of watching TV or playing computer games for time playing outside.
他们希望孩子们能在看电视或玩游戏的时间里抽出至少三十分钟的时间换为户外玩耍。
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