Sigmatropic
n. [化]σ移位的,单键转移的
🗣️ 情景例句
I doubt it, sir. We'll try, but I can't promise anybody before 3:30.
我没把握，先生。我们会尽早的，但我不敢许诺3：30以前行。
Wit without learning is like a tree without fruit.
仅有机智而无真才实学，犹如一棵大树不结果。
So it is a comparatively simple step from locating the sea bottom to locating a shoal of fish.
从测定海深到测定鱼群，这一进展比较容易。