Today, we face new threats and instabilities.

今天, 我们又面对着新的威胁与不稳定因素.

And the new system runs extremely smoothly, without any major problems or instabilities (knock on wood).

并且新系统运行平稳，完全没有任何问题和不稳定（运气不错）。

Thus becalmed , the clouds are more susceptible to wave instabilities.

所以, 这些云气较易受重力不稳定性的影响.

The electorate became increasingly intolerant of instabilities when the actual rates transgressed those considered tolerable.

当实际税率超过可以容忍的限度时,选民们就会越发不能忍受经济的不稳定性.

This is because a lot of quasi-periodic variations in X-ray binaries and active galactic nuclei are believed to be related to the instabilities of the disk.

这是因为许多X射线双星和活动星系核的周期性光变与盘的不稳定性密切相关。