crop

corn, crop, grain

这些名词都有“谷物”之意。
corn: 主要指大麦、小麦、燕麦、裸麦、玉蜀黍这5种谷物及其粒子。
crop: 指谷物或果类等一年或一季的收成，也可指地里的农业作物或谷物。
grain: 指稻、麦等谷类及其粒子。

crop, harvest, yield

这些名词均含有“收成”之意。
crop: 普通用词，侧重指农作物一次收割或一季的收成。
harvest: 主要指农作物或水果的收获量，有时也指收割的行为。
yield: 指生产物，农作物的总产量。

名词 crop:

1. the yield from plants in a single growing season
   同义词：harvest
2. a cultivated plant that is grown commercially on a large scale
3. a collection of people or things appearing together
4. the output of something in a season
5. the stock or handle of a whip
6. a pouch in many birds and some lower animals that resembles a stomach for storage and preliminary maceration of food
   同义词：craw

动词 crop:

1. cut short
2. prepare for crops
   同义词：cultivate, work
3. yield crops
4. let feed in a field or pasture or meadow
   同义词：graze, pasture
5. feed as in a meadow or pasture
   同义词：browse, graze, range, pasture
6. cultivate, tend, and cut back the growth of
   同义词：snip, clip, trim, lop, dress, prune, cut back

1. The farmer paid 3 laborers to gather the crop.
   农场主雇佣3名工人收割庄稼。
2. All sorts of difficulties cropped up.
   各种各样的困难意想不到地出现了。
3. The tomatoes have cropped well this year.
   今年马铃薯丰收。
4. We have had the biggest wheat crop ever this year.
   今年我们的小麦收获量是有史以来最好的。
5. The flood did a lot of damage to the crops.
   洪水毁坏了大量农作物。

crop

n.（名词）

Cultivated plants or agricultural produce, such as grain, vegetables, or fruit.
庄稼：种植的植物或农产品，如谷物、蔬菜或水果
The total yield of such produce in a particular season or place.
收成：在某一季节或地区该类产品的总产量
A group, quantity, or supply appearing at one time:
一群，一组：同时涌现的一批、一群或一系列：
例句：
a crop of new ideas.
一连串的新思想

A short haircut.
平头
An earmark on an animal.
动物耳印

A short whip used in horseback riding, with a loop serving as a lash.
短马鞭：一种用环状物做鞭梢的骑马用的短鞭
The stock of a whip.
鞭柄
Zoology
【动物学】
A pouchlike enlargement of a bird`s gullet in which food is partially digested or stored for regurgitation to nestlings.
嗉囊：鸟类食管部位的囊状的扩大部分，用来对食物进行部分消化或贮存食物进行反刍来喂食雏鸟
A similar enlargement in the digestive tract of annelids and insects.
消化器官：环节动物或昆虫的消化道中的类似扩大部分
v.（动词）
cropped,crop.ping,crops
v.tr.（及物动词）

To cut or bite off the tops or ends of:
割掉，修剪：割去或啃去…的顶部或末梢：
例句：
crop a hedge; sheep cropping grass.
修剪树篱；啃吃青草的羊群

To cut (hair, for example) very short.
剪短：将（头发等）剪得很短
To clip (an animal`s ears, for example).
削掉：削掉（动物的耳朵等）
To trim (a photograph or picture, for example).
剪修：剪修（如照片或图画）

To harvest:
收割；收获：
例句：
crop salmon.
猎捕鲑鱼

To cause to grow or yield a crop.
使谷物生长，使谷物收成
v.intr.（不及物动词）
To feed on growing grasses and herbage.
啃青草：以生长中的草和植物为食
To plant, grow, or yield a crop.
种植谷物，生长谷物，生产谷物

<常用词组>crop up
To appear unexpectedly or occasionally:
意外出现，偶然出现：
例句：
.one of the many theories that keep cropping up in his story.(Christopher Lehmann-Haupt)
.一个在他的故事中不断意外出现的理论.(克里斯托夫·莱曼——豪普特)

来源：
Middle English
中古英语
from Old English cropp [ear of grain]
源自 古英语 cropp [谷物的]