轮作的英文：
alternation of crops
rotate

参考例句：

Much of the value of the timothy/meadow fescue ley for milk production is attributable to its palatability
梯牧草;草地牛毛轮作草场对于饲养奶牛的主要价值，就在于其适口性好。

Most of it has been retained in alternate husbandry
其中大部分成为轮作草地。

The technique of rotating crops has been introduced to the farmers.
农作物轮作技术已经介绍给农民们了。

alternation是什么意思：
n. 交替，变换，轮流

Are there alternatives to prison?
除了监禁还有其他办法吗？

should alternately present as undulate .
激情平淡应呈波浪形交替出现。

There are two reasonable alternatives.
有两个合理的替代方案。

crops是什么意思：
n. 作物；庄稼；收成；一批，一群；大量
v. 种植；收成

get the crops, harvest, etc in
收获作物、 庄稼等.

The ceaseless rain was bad for the crops.
绵绵不断的雨对庄稼很有害。

Crop residues are left on the surface.
作物的残根留在地面。

rotate是什么意思：
v.（使）旋转；（使）轮流
adj. 辐状的

The crankshaft makes three rotations for each rotation of the rotor.
转子每转一周，曲轴转3周。

eddy current rotating brake
涡流旋转制动机

There will have to be a more defined playing rotation.
必须要有一个更详细的比赛轮转计划。