Sigmic
a. ∑粒子的, 含∑粒子的
🗣️ 情景例句
John cannot get to the phone right now.
John现在没办法接电话。
I didn't mean to.
我不是故意的。
'Whatever are you doing up here Bill?' asked the vicar in surprise.
“你究竟在这上面干什么，比尔？”牧师惊讶地问。