Subnanogram
低于毫微克(数量级)
🗣️ 情景例句
to go over to the construction site with me?
去看一看建筑工地吗？
A contented mind is perpetual feast.
知足常乐。
The thieves dropped the torch and ran away as quickly as they could.
小偷扔下了手电筒，飞快地逃走了。