Antiair
a. 防空用的
??? 情景例句
Shopping vouchers are ofter a good means of attracting customers.
購物優惠券是吸引顧客的好方式。
I'm so glad you could make it.
我很高興趕上時間。
I've been working so hard recently that I haven't had any time for collecting new stamps.
最近我的學習一直很緊張，沒有時間收集新郵票。