be flat的用法和样例:
例句
- After running in the marathon, she was flat out for a week.
她参加马拉松比赛后一星期都疲惫不堪。
- People used to think that the world was flat; now we know it is round.
从前人们以为地球是平的,现在知道是圆的。
- The land was flat and treeless and gave no cover to the troops.
该处地势平坦又没有树木,部队无处隐蔽。
- The market has been flat today.
今天市场上生意一直很清淡。
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