紧密状态的英文：
compaction

To become compact or solid;cohere.
凝固使坚实或变硬；粘着紧凑

I want to buy a compact.
我想买一个小粉盒。

The Smith boy was compacting the trash.
史密斯家的男孩在把垃圾压紧。

A compact flat,car,kit
小型的单元、汽车、箱子等

Not taut, firm, or compact; slack.
松弛的不紧、不严密或不坚实的;放松的