He spends on the average two hours a day on reading.他平均每天用两小时读书.On the average, such transformations balance out.平均起来, 这种转化可以互相抵消.This statement is true only on the average.这种说法只是大体上正确....
This year we're going trekking in Nepal.今年我们准备去尼泊尔远足。She can't come pony trekking after all because she's in a delicate condition.她结果还是不能坐小马车旅行,因为她已怀孕.When we think of adventurers, many of us conjure up im...