相關(guān)單詞近義詞 occasionally 偶爾地, sometimes 有時(shí), on occasion 偶爾, at times 有時(shí), now and again 時(shí)而, now and then 時(shí)而, from time to time 有時(shí)臨近詞once, Onceriu 返回 once in a while