1、guarantee 例句：Unity is the guarantee of victory. 团结是胜利的保证。 2、insure 例句：To insure the highest volume of milk, the calf is taken away from her immediately after birth. 为了确保生产最大量的牛奶，小牛犊一出生就被立刻从母奶牛身边带走。 3、make certain 例句：Make certain you value and...
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