这已经成为一种习惯。

It became a habit.

youdao

所以，这已经成为一个严重问题。

So, this is becoming a serious concern.

youdao

这已经成为一个没有任何冒险性的地方。

This was a place that couldn’t have been more adventurous.

youdao

The cells of this surrounding sheet have become different in some way and they develop into the placenta and the extra embryonic tissues.

环抱在周围的这一层细胞,已经开始逐渐分化,最终成为胎盘,及额外的胚胎组织

耶鲁公开课 - 生物医学工程探索课程节选

It is a claim already, and as you've seen in Aristotle, towards the end of the history of the free polis, it is something necessary for mankind.

如你在亚里斯多德那里看到那样,在临近自由城邦历史的末期,这已经成为了一种宣言,这对人类来说是不可或缺的

耶鲁公开课 - 古希腊历史简介课程节选