Polycyclization
聚环作用
🗣️ 情景例句
What guarantee do I have that it won't break down easily?
有什么保障它不会轻易出故障？
The first step to virtue is to abstain from vice.
避开作恶是走向美德的第一步。
At the same time, a number of teenagers climbed on to the dish and held a little party of their own.
就在这个时候，许多十几岁的孩子爬盘子举行他们自己的集会。他们跳起了舞，盘子难以承受。