真空 zhēnkōng vacuum
(physics, fig.) vacuum; (slang) to not wear underwear
怎么记住“真空”: 真 truly + 空 empty = vacuum.
汉字
用法
- A physics vacuum / empty space - 真空状态 (zhēnkōng zhuàngtài) a vacuum state; 真空包装 (zhēnkōng bāozhuāng) vacuum packing.
- Figuratively a void where something is absent: 权力真空 (quánlì zhēnkōng) a power vacuum.