Sigma bond
[化] σ键
🧩 词语组成解析
[计] 求和\\n[医] σ(希腊文第十八个字母)
🗣️ 情景例句
Can you tell me what time you close?
您能告诉我关门的时间吗？
Don't forget to write to let us know you arrived safely.
不要忘记写信回来，告诉我们你已经安全抵达。
since the things he cares for will continue.
因为自己关心的一切事物都会继续下去。