Sigma.
[医] 千分之一秒
🗣️ 情景例句
The government has adopted many measures to promote its economy.
政府采取了许多措施来发展经济。
Go farther and fare worse.
一动不如一静。
She went into my room and got a big surprise when she saw all those books on the floor.
她走进我的房间，当她看到地板上的那些书时，大吃一惊。