backer-up

常见例句

• How much do all these figures stack up to?
  这些数字的总和是多少？
• Swimming is the best way to tone up your body.
  游泳是健体强身的最好方法。
• I believe he has started reading up anthropology.
  我相信他已开始攻读人类学。
• It is now our aim to set up a factory.
  我们现在的目的是创办一座工厂。
• I need a piece of string to tie this parcel up.
  我需要一根细绳把这包裹扎起来。
• She drives carefully up the rocky lane.
  她驾车小心地从这条很多石头的小路上驶过去。
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