1. It is an accepted practice to pay a deposit with your order, which assures the seller that you are in fact a serious buyer. 在订货时付定金是公认的做法，这能向卖家保证你是一个认真的买家。
2. It assures that the astronomical cycles have been in existence for billions of years. 这使人们确信天文周期已经存在了数十亿年。
3. The beauty of the experimental design is that it effectively rules out confounding variables; acoustic isolation assures that the female can respond only to the song structure itself. 实验设计的美妙之处在于它有效地排除了混淆变量；声学隔离确保了雌性只能对鸣声结构本身做出反应。
4. He assures her that he's coming home soon. 他向老婆保证自己马上就会回家。
5. She assures him that she can do her job. 她叫梅森放心，她可以做好她的工作。
