Sigma electrons
[化] σ电子
🧩 词语组成解析
[计] 求和\\n[医] σ(希腊文第十八个字母)
n. 电子( electron的复数形式 )
🗣️ 情景例句
You may use a first name if you are asked to (call me …).
如果你得到允许的话，你便可以直呼某人的名字。
Experience is the mother of wisdom.
智慧来自经验。
I had all the usual symptoms of someone giving up smoking: a bad temper and an enormous appetite.
脾气暴躁和食欲旺盛。