marking off

画线
划线

例句与用法：

After scrubbing away for half an hour I still couldn't get the mark off.

我不停地擦了半小时，还是不能擦掉这个斑点。

An area the size of the Hornet's flight deck was marked off on an airstrip and they practiced taking off time after time from this restricted space.

在机场上标出一块与大黄蜂号飞行甲板一样大小的地方，他们从这样一块有限的面积上一次又一次地练习起飞。

词形变化：

名词复数: markhor |