fit in sth.
或
fit inside sth
fit into sth.
表示(容器/箱子/盒子/等等) 够大,
比如
all the books fit in the box 箱子够大,足以装下所有的书
fit in with
的意思是
相处得来,适合,适应,融入,配合,符合
例:
As an overseas student in America, I must learn to fit in with my American classmates
作为一个在美国的留学生,我必须学会和我的美国同学相处
A new building must fit in with its surroundings.
一座新的建筑物必须符合与周围环境
You can't expect a baby to fit in with your existing routine.
你不能指望一个婴儿会去配合你现有的生活常规
满意请及时采纳,谢