輪番的英文：
1.to assume duties in turn; to take turns

assume是什么意思：
v. 假定；臆断；采取；承担；呈现；夺取，继承；装腔作势

The responsibility for the accident was assumed by me.
事故责任由我承担。

To state or assume as a proposition in an argument.
假设，预设命题在论证中做为一命题陈述或假设。

take up (=assume) this mission
承担这使命

duties是什么意思：
n. 责任；义务；职责；职务；税

duty to rear; duty to provide support
抚养义务

a truck; a heavy duty truck
载重汽车

The path of duty is the path of safety
尽职的路是安全的路

turn是什么意思：
v. 使旋转；翻过来；转弯；转向；转变
n. 旋转；翻转；转弯；变化

Not turn away from the old, but turn toward the new.
不是背弃旧的，而是朝向新的。

As it turned out, the advice was bad.
事实证明，这个主意极不高明。

I'll take you at the turn.
你转身时我再来对付你。