normal operating period的用法和樣例：
例句
- Even though he is a casual worker,he works a normal work weekly.
雖然他是一個(gè)臨時(shí)工，每周也做滿(mǎn)正常工作時(shí)間。 - Enclosed is an important leaflet highlighting local service telephone numbers for use during normal working hours.
附上一張重要的活頁(yè)，著(zhù)重列有在正常工作時(shí)間內可用的本地服務(wù)電話(huà)號碼。
