医院里所有婴儿的脚踝上都系有姓名标签。

All babies in the hospital have name tags tied round their ankles.

《牛津词典》

每只动物都系上了标有号码的小牌，以便辨认。

Each animal was tagged with a number for identification.

《牛津词典》

没什么大问题，因为我们都系了安全带。

There was nothing serious, because we all wore the seat belts.

youdao

And for Americans, all our democratic experience and do I have to put a tie on for this event or not?

美国人也如此,我们都参与民主政治,知道在什么场合需要系领带,比如现在

耶鲁公开课 - 美国内战与重建课程节选

So anything that goes from a higher energy level to 2 is going to be falling within the Balmer series, which is in the visible range of the spectrum.

任何更高能级到2能级2,都是属于Balmer系，它在可见光谱中。

麻省理工公开课 - 化学原理课程节选

So in talking about the hydrogen atom, they actually have different names for different series, which means in terms of different n values that we end in.

所以就氢原子来说，它的每个系都有不同的名字，代表了不同的末态n值。

麻省理工公开课 - 化学原理课程节选