1 sentence for 真空 (zhēn​kōng — commando)

1. 为了追求清凉的感觉，有些人在夏天会尝试真空打扮。

   wèi​le zhuī​qiú qīng​liáng de gǎn​jué, yǒu​xiē rén zài xià​tiān huì cháng​shì zhēn​kōng dǎ​ban.

   To keep cool, some people try going braless in the summer.

   Source: Dong Chinese Dictionary