Heptalenium
并庚间三烯离子
🗣️ 情景例句
Is that one of the things Susan and Harry are bringing?
那是不是属于Susan和Harry要带的？
When an opportunity is neglected,it never comes back to you.
机不可失，时不再来；机会一过，永不再来。
Dressed in dark glasses and old clothes, they had taken special precautions so that no one should recognize them.
他们戴着墨镜，穿着旧衣裳，特别小心以防别人认出他们。