Over a period of time的用法和樣例：
例句
- An increase in the incidence of oxacillin-resistant S. aureus oer time was obsered.
并且經(jīng)過(guò)一段時(shí)間的觀(guān)察發(fā)現耐苯唑西林的金葡菌的比例有所增加。 - The clean wool is then spun by hand.The wool is loosely dipped into dyeing vats and left for a time that could be judged only by the expert craftsman.
漂染的過(guò)程是在染桶里進(jìn)行的，將稀松的毛線(xiàn)放在染桶里保持一段時(shí)間，而只有專(zhuān)業(yè)的工匠才能把握好這段時(shí)間的長(cháng)短。
