Phenanthryne
[化] 菲炔
🗣️ 情景例句
He was ill at ease with people whom he didn't understand.
他和不熟悉的人在一起感到不自在。
Do you have a valid license?
你持有效驾驶执照吗？
let alone distances of tens or hundreds of light years.
更不用说几十光年或几百光年远的地方了。