dies off

Know at least two or three languages, so if one dies off, you have another one to fall back on while you train for a new technology.

至少了解两到三种语言，所以，如果某种语言过时了，你在学习新技术的时候还可以依靠另一种语言。

As these mice age, a certain group of neurons deep in their brains dies off, and they experience cognitive declines.

当这些小鼠变老，脑内深部的一些特定神经元细胞会死亡，小鼠的认知智能下降。

The sensation dies off for the time.

那场风波一时又平静下来了。