the time of year when crops are cut and collected from the fields, or the activity of cutting and collecting them, or the crops that are cut and collected

the grain/potato/grape harvest 谷物／土豆／葡萄收获期

We had a good harvest this year. 今年我们收成不错。

Farmers are reporting a bumper (= very big) harvest this year. 农民说今年的收成非常好。

It won't be long now till harvest (time). 现在离收获时节不远了。

to pick and collect crops, or to collect plants, animals, or fish to eat

In the US, winter wheat is harvested in the early summer. 在美国，冬小麦一般在初夏收割。

Farmers sort the vegetables when they harvest.

to take cells or other body parts from someone for medical use

The donor organ is harvested at the accident scene and rushed to a hospital. 事故现场采集的捐献器官被迅速送往医院。

Stem cells harvested from cord blood have been used to successfully treat dozens of serious illnesses.