[yóu]
[名]
（原由） cause; reason
reason
理由
cause
原由
（姓氏） a surname
You Yu
由余
[动]
（经过） pass through
the road one must follow or take; the only way
必由之路
（顺随； 听从） follow; obey
Things are beyond one's control.
事不由己。
Let her do as she pleases.
由她去吧。
[介]
（由于） because of; due to
have only oneself to blame
咎由自取
Mistakes due to carelessness may have serious consequences.
由粗心大意造成的错误有可能带来严重的后果。
（通过） by; through
be elected after democratic consultation
由民主协商选举产生
be recommended by the masses
由群众推荐
Did you come by the nearest road?
你是由最近的路来的吗?
We came by the fields, not by the roads.
我们由田间而来， 不是由大路而来。
This way in.; Entrance.
由此入内。
（表示某事归某人去做） by
All the travelling expenses will be borne by the host country.
旅费由东道国负担。
Your side will be held responsible for all the consequences arising therefrom.
由此产生的一切后果由你方负责。
It's up to him to resolve this problem.
这个问题应由他来解决。
（表示起点） from
set off from Dalian
由大连出发
spread over a whole area from one point
由点到面
The wild geese fly from north to south.
大雁由北向南飞。
We watched the mists ascending from the valley.
我们看着迷雾由山谷升起。