选择性颈部廓清术的英文：
END, elective neck dissection

end是什么意思：
n. 最后部分，末端，尽头；终止；结局；死亡；目的；一端，一方；部分
v. 结束，终止
adj. 最后的，最终的

Is the conference ended?
会谈结束了吗？

To join or be joined end to end;abut.
首尾相连在末端相连或毗连；邻接

Tie this end to the pole but leave the other end free.
将这一端系在柱子上，让另一端松开著。

elective是什么意思：
a. 选举的,根据选举的,选任的
n. 选修课程

This is a direct election.
这是直接选举。

He was unanimously elected as President.
人们一致选举他当总统。

The elections were free and fair.
选举是自由公正的。

neck是什么意思：
n. 脖子；衣领；狭长地带
v. 搂住脖子亲吻

The horses were running neck and neck.
这些马跑得不分上下。

Jack is neck and neck with Tom in the race.
杰克和汤姆在比赛中齐头并进。

It is a neck and neck horse race right down to the wire
这次跑马赛从头到尾都胜败难分。