Polypectomy
n. [醫]息肉切除術
??? 情景例句
My parents paid my way through college.
我父母供我上大學。
There are spots in (or on) the sum.
人孰無過。
As is so often pointed out, knowledge is a two-edged weapon which can be used equally for good or evil.
正像人們常常指出的，知識是一把雙刃刀，可以用于造福，也可以用來為害。