Isopentene
异戊烯
🗣️ 情景例句
Ah, Richard, Marilyn, I want you to meet John O'Neill.
啊 Richard Marilyn 我向你们介绍John O'Neill。
What's your favorite musical instrument?
你最喜欢的乐器是什么？
No, look, it says Closed. It's not open this morning.
不对，看！写着“关门”的，今天早上不开。