Etu
abbr. electron tube 電子管; ethylene thiourea 乙烯基尿素
??? 情景例句
A photographic journey.
一次透過攝影作品的旅行。
An ounce of prevention is worth a pound of cure.
預防勝于治療。
6 What would you like to be admired for?
6。你樂于被夸獎的事是什么？