Seim
abbr. simple effective index method 简单有效折射率法
🗣️ 情景例句
I would like a Coca.
我要可乐。
Knowledge is the antidote to fear.
知识可以解除恐惧。
He was just falling asleep when there was a loud knock at the door.
他刚要入睡，就有人很响地敲门。