half-hour
/ˈhɑːfˈaʊə(r)/noun
(亦作half an hour)
1- a period of thirty minutes半小时, 三十分钟：
buses run every half-hour.
公共汽车每隔半小时一班。
1.1
- a point in time thirty minutes after any full hour of the clock半点钟：
the library clock struck the half-hour.
图书馆的钟敲响了半点钟。
派生词