1. Mr Tu's statements are of course reasonable, and schools do have the responsibility of guaranteeing security. 涂先生的话当然有道理，学校确实有保障安全的责任。
2. As demand grew, people began selling promissory notes guaranteeing the future delivery of prized tulip bulbs. 随着需求的增长，人们开始出售期票，以保证未来高价的郁金香球茎的交付。
3. It also mandated that utilities purchase wind energy at a preferential price—thus guaranteeing investors a customer base. 它还要求公用事业公司以优惠价格购买风能，从而保证投资者有一个客户群。
4. If David Cameron's Conservatives had a brilliant idea for guaranteeing every graduate a well-paid job, they would have unveiled it by now. 如果戴维·卡梅伦领导的保守党有一个聪明的主意，能保证每个毕业生都能获得高薪工作，他们现在就应该公布了。
5. We stagger from our rooms in various states of undress to the sound of fire engines screaming round the corner, guaranteeing we are all wide awake. 我们穿着各式各样的衣服，摇摇晃晃地从房间里走出来，听到消防车在拐角处呼啸的声音，这保证了我们都是清醒的。
