"Other volunteers took the lead role in making sure that gifts for certain communities stay together and get the process going and making sure that the individuals and volunteers who were there to wrap had a supply of wrapping papers and scissors and tape and everything.

VOA: standard.2009.12.24

making certain that people are able to understand what you're saying.

你要确保人们可以听懂你在说什么。

在英语系国家 - SpeakingMax英语口语达人

It's got beliefs about how to do that by blocking certain paths or by making other pieces on my side vulnerable.

它有通过阻断特定棋路,或者攻击我的棋子来达到目的的信念

耶鲁公开课 - 死亡课程节选

It's - a suture or a stitch has to hold the wound closed so it has to have certain mechanical strength and imagine the problem of making something that's dissolvable so it disappears but also is strong enough to hold a wound closed reliably for a length of time.

能够拉紧切口的缝合线,就必须具有一定的机械张力,大家想像一下制造这种缝合线的难度,身体组织不仅要能吸收这种缝合线,而且这种线必须有足够的张力,一定时间内能够拉紧切口

耶鲁公开课 - 生物医学工程探索课程节选

This is another thing to notice. He's not just making us experience Lolita's name the way he does; he's assuming that there are certain kinds of questions that we will ask. "Did she have a precursor?"

这也值得注意，他不仅让我们体会,他感知到的Lolita的名字，他想象出了,我们可能会提出的问题，在她之前还有别人吗“

耶鲁公开课 - 1945年后的美国小说课程节选