到现在为止，那些枪基本是基于荣誉制度而被贩售的，也就是购买者向贩售者保证他们可以合法地购买武器。

Until now, those guns have been sold primarily on an honour system, wherein the purchasers ensure the sellers they are legally entitled to buy firearms.

《柯林斯英汉双解大词典》

要保证收成好，地要翻耕两遍。

To ensure a good crop the soil had to be turned over twice.

《新英汉大辞典》

“你确定这筏子安全吗？”她不安地问。“再安全不过了，”马克斯自信地向她保证。

"Are you sure the raft is safe?" she asked anxiously. "Couldn't be safer," Max assured her confidently.

《柯林斯英汉双解大词典》

Now, texts from Ancient Near Eastern cultures suggest that a central function of the rituals that were performed in sanctuaries was to secure the perpetual aid and blessing of a well-disposed deity.

古近东文化的课文中提出,在圣所里进行的仪式的一个主要功能,是保证能够向神灵获得永久地帮助和祝福。

耶鲁公开课 - 旧约导论课程节选

Well, not everybody, but everybody can use to keep emails safe, just like sort of a really easy thing to do.

嗯，不一定是所有人，但是每个人都可以轻而易举地用这种密码来保证自己邮箱的安全，

积极参与俱乐部活动 - SpeakingMax英语口语达人

So, in terms of what it is that you need to prepare and bring with you for the exam, you need to bring your MIT ID, especially if you haven't been showing up regularly to your recitations and you aren't 100% sure if your TA knows exactly who you are, you need to make sure you have your MIT ID with you.

那么，关于你需要做哪些准备,考试可以带哪些东西，你需要带着你的学生证，尤其是如果你没有经常地参加,习题课,你不能百分之百保证,你的助教确实认识你，那么你更得确保自己到时带着学生证。

麻省理工公开课 - 化学原理课程节选