One of which was smoking,for obvious reasons.

其中一种是吸烟，有些明显的原因。

Two watches were stolen, one of which was mine.

两只手表被偷了，其中一只是我的。

Irm taking four courses, one of which is accounting.

咱选学四门课，其中一门是会计学。

MM: According to my information, they consist of one elf, one dwarf, one halfling, and three humans, one of which is female.

根据我的情报，这个组织由一名精灵、一名矮人、一名半身人和三名人类组成，其中一名人类是女性。

MM:According to my information, they consist of one elf, one dwarf, one halfling, and three humans, one of which is female.

根据我的情报，这个组织由一名精灵、一名矮人、一名半身人和三名人类组成，其中一名人类是女性。

One of the four boxes was sealed incorrectly, but they lost track of which one.

四个箱子中的一个封装是不正确的，但他们不知道是哪一个。

The feeling of boredom is one of which he knows nothing.

他从来也不懂什么叫烦闷无聊.

One of which is glutamate receptors, which we know play a role in learning and memory.

其中之一就是在学习和记忆中发挥作用的谷氨酸受体。

Confucius is the meaning of which on behalf of one of the richest.

孔子就是里面最富有代表意义的一位。

He's famous for a lot of things, one of which is covalent bonding.

他有许多著名的发现，其中一个便是共价键。