请问fill in, adapt to, adjust to的区别？

Question

这三个词组是否都有“适应”的意思，有什么区别？

Answer 1

fill sth←→'in 1 (BrE) to complete a form, etc. by writing information on it 填写（表格等） ：
2 to fill sth completely 填满；塞满 ：
3 to spend time doing sth while waiting for sth more important 消磨，打发（时间）
4 to complete a drawing, etc. by covering the space inside the outline with colour 给（图画等）最后着色
7fill sb 'in (on sth) to tell sb about sth that has happened 向…提供（情况）
adapt (youself) to
to change your behaviour in order to deal more successfully with a new situation 适应（新情况）
adjust to
1 [VN] ~ sth (to sth) to change sth slightly to make it more suitable for a new set of conditions or to make it work better 调整；调节
2 ~ (to sth/to doing sth) | ~ (yourself to sth) to get used to a new situation by changing the way you behave and/ or think 适应；习惯