fit in 主要意思是“有地方容纳”,和后面两个短语意思不相干 例子:All of us couldn't fit in there. 那里挤不下我们所有的人。 adjust to与adapt to含义很接近, adjust to 使适应于。 adapt to 适应于,习惯于。两者两者只有细微的差别,基本可以互换。
fit in 一般指和人合的来,或者适应某事物,通常与with sb/sth l连用。 adjust to ,适应,习惯。to get used to a new situation by changing the way you behave or think . adapt to ,to change your behaviour in order to deal more successfully with a new sitiation.适应新情况