请问be used to,be accustomed to,adjust to,adapt to 意义,用法,区别

e used to do sth.过去常做,过去习惯于
be accustomed to doing sth 习惯于
It used to be said that
过去人们常说
adjust to 适应,调节
adapt to 适合
区别：
adapt 指“修改或改变以适应新条件”,
如:
You should adapt yourself to the new environment.
你应该适应新环境.
adjust 指“调整”、“调节”使之适应,
如:
You can't see through the telescope until it is adjusted to your eyes.
你把望远镜调节到适合你的目光之后,你才看得见.

be used to=be accustomed to doing sth 习惯于
adjust to ＝adapt to sth 适应于