Secocubane
拟方烷, 三环辛烷
🗣️ 情景例句
Sorry. I have a meeting right now.
抱歉，我马上有个会议要开。
Which umpire will referee the baseball game?
不知道哪一个裁判要执法这场棒球赛？
Yet this is not always the case.
但情况却并不总是这样。