or表示人的后缀的单词:
doctor 医生;
actor男演员;
agitator鼓动者;
ambassador大使;
author作家;
collector收集家;
compositor排字工人;
conductor售票员;
conqueror征服者;
creator 创建者
Doctors still don't understand much about the disease.
医生对这种疾病还不太了解。
Doctors still don't understand much about the disease.
医生对这种疾病还了解不多。
Who's the author?
作者是谁?
As the author of the proposal I cannot agree with you.
我作为提案的发起人不能同意你的意见。
The author has condensed a great deal of material into just 100 pages.
作者在短短100页中浓缩了大量信息。