Thiona-phthene
[化] 苯并噻吩
??? 情景例句
Our teacher drills us in English.
我們老師讓我們反復操練英語。
How much paint did you want to order?
你要訂購多少油漆？
It's a good idea to hold such conferences.
召開這樣的會議真是個好主意。