那么，在地板上放五秒钟这个时间，是将可食用食物与食物中毒区分开来的临界阈值吗？

So is five seconds on the floor the critical threshold that separates a piece of eatable food from a case of food poisoning?

youdao

当雪在陡峭的斜坡上堆积时，它会达到一个临界点，在这个临界点上，最轻微的震动就会使它滑进下面的山谷。

As snow accumulates on a steep slope, it reaches a critical point at which the slightest vibration will send it sliding into the valley below.

youdao

此服务器上的负载已经达到了临界水平，用户和客户都对性能感到不满。

The load on this server has hit a critical level, and users and customers alike are complaining about performance.

youdao

And, when zinc sulfide is hit by particles or by anything, by radiation or by particles of greater than a certain critical energy, there is a glow.

当粒子或其他东西,通过辐射或粒子的方式，并且能量高于临界值,撞击到硫化锌的表面上的时候，就会发光。

麻省理工公开课 - 固态化学导论课程节选

As we increase the voltage, we get to a critical value at which it is possible to actually draw electrons across the gap.

当我们增加气压时，我们得到了一个临界值，在这个临界值上,将电子吸引过来是完全有可能的。

麻省理工公开课 - 固态化学导论课程节选