quartering造句

1、The bombers had conducted a 300-mile search, quartering and requartering the area.
轰炸机在那地区上空一次又一次地来回执行三百英里搜索。

2、He swam quartering upstream.
他向上游游去。

3、He swam quartering upstream, but still was swept downward rather faster than he had expected.
他向上游游去，但还是被水冲了下去，流速比他预料的要快得多。