Pseudobutylene
2-丁烯
🗣️ 情景例句
By doing that, it will encourage reading.
这样做能鼓励阅读。
I'd appreciate it if you would turn out the lights.I'm sleepy.
如果你关灯我将感激你的.我困了。
American - English - Chinese! There's no difference, says Wei Hua. We are all friends!
“美国，英国，中国没有什么区别”，魏华说，“我们都是好朋友”。