Optional nature
[法] 任择性, 非强制性, 任意性
🧩 词语组成解析
🗣️ 情景例句
Shall we have a chat in the sitting room over the tea for a while?
我们在客厅呆一会儿，喝茶聊天好吗？
Half a tale is enough for a wise man.
聪明人凡事只须听一半，就会明白究竟。
Both the police and the workmen were grateful to the student for this piece of advance information.
警察与工人都对那个学生事先通报情况表示感谢。