Nonperiodic
a. 非周期的
??? 情景例句
If you are going to come over, make suer it's during our summer.
如果你打算過來，記得我要在我們的夏季過來。
You must not pledge your own health.
切不可把健康作孤注一擲。
That's the latest fashion.
這是最流行的款式。