Polycyclization
聚环作用
🗣️ 情景例句
He has the advantage of a good education.
他有受过良好教育的优势。
Choose an author as you choose a friend.
选书如择友。
employing full-time technicians and run on specially-written software.
雇用专职的技师，而且得用专门编写的软件才能运行。