Perstoff
[化] 双光气
🗣️ 情景例句
I hear the exams will be very tough.
我听说考试挺难的。
Many new ideas are discovered during college years.
大部分崭新的观念都产生于大学时代。
People are always talking about 'the problem of youth'.
人们总是在谈论“青年问题”。