劍橋詞典a change from using or doing one thing to another 轉(zhuǎn)換,轉(zhuǎn)變;徹底改變 The switchover to daylight saving time represents a one percent saving of electricity annually . 使用夏時(shí)制后,每年的電力使用量節(jié)省了百分之一。 返回 switchover