英语语法分析

Defoliants sometimes are applied to crop plants such as cotton to facilitate harvesting.

落叶剂有时施用于农作物，例如棉花，以便采收。

The USFK says that during the late seventies barrels of other defoliants were buried on base, but were dug up within a few years and removed.

驻韩美军说，1970年代有其他脱叶剂埋在营地内，但在几年内就挖出并移走了。