Pentamethylene
n. [化]环戊烷
🗣️ 情景例句
Bye-bye.
再见。
It is a silly fish, that is caught twice with the same bait.
蠢人才吃两次亏。
Then he spoke slowly, but I could not understand him.
于是他说得慢了，可我还是听不懂。