Sigmatropic
n. [化]σ移位的,单键转移的
🗣️ 情景例句
No. No train. Just the dress.
不 ，不加裙摆。就是这样连身套装。
I feel guilty because I haven't written her lately.
因为我最近没给她写信，我感觉到有罪。
Control yourself!
克制一下！