Pentamethylene
n. [化]环戊烷
🗣️ 情景例句
Good-bye.
再见。
Why don't you turn off the stupid program?
何不把无聊的节目关掉？
The more expensive kind of antique shop where rare objects are beautifully displayed in glass cases to keep them free from dust is usually a forbidding place.
高档一点的古玩店为了防尘，把文物漂亮地陈列在玻璃柜子里，那里往往令人望而却步。