About 80% of the cyanide at that point is gone, so it does render the root much more safe.

这时大约百分之八十的氰化物都跑掉了，因此这确实可以使这些根更加安全。

麻省理工公开课 - 化学原理课程节选

on our planet, and effects could be security concerns,

在我们的地球，这些后果可能会危及到安全，

全球变暖和发达国家 - SpeakingMax英语口语达人

And with some generals or with whoever else, homeland security, how did you go about settling these fights?

或者是和其他官员，关于国分歧家安全问题有分歧，你是怎么处理这些分歧呢？

普林斯顿公开课 - 国际座谈会课程节选

But in many regards, it is a matter of space, a matter of supplies, a matter of security where issues come out which don't really matter whether you believe in religion or not.

但是就各种方面来说，是关乎空间，关乎资源供应，关乎安全,这些问题并不一定和你,是否有宗教信仰有关。

普林斯顿公开课 - 人性课程节选

And so they're already very safe, very effective vaccines available for many infectious diseases.

所以这些疫苗非常安全有效,常备用来对付各种传染病

耶鲁公开课 - 生物医学工程探索课程节选

But I think this is rather an implausible suggestion because, of course, you could have these glorious views just by going up in the airplane and looking down from the safety of your airplane.

但我认为这是个似是而非的建议,因为，当然，你可能只是坐飞机向上飞,并安全地向下看,就会有这些迷人的视野。

耶鲁公开课 - 死亡课程节选

Even when the president first came into the office he is always careful to make sure he was always well briefed, meet regularly with his national security team, with his intelligence briefers, on a regular basis.

即使是总统从一开始,走进办公室,他总会很小心地确保,他有个良好的情况简介，和他的安全小组见面，和情报简报员见面，这些都是定期的。

普林斯顿公开课 - 国际座谈会课程节选