drive up 抬高
    drop by 順便走訪，非正式訪問(wèn)
    drop off 睡著;(讓…)下車
    drop on 訓(xùn)斥，懲罰
    drop out 退出，退學(xué);掉落
    drop over 順便來(lái)訪
    dry up (使)干涸
    due to 由于;應(yīng)歸于
    in due course 在適當(dāng)?shù)臅r(shí)候
    do duty for 當(dāng)…用，起作用
    do one's duty 盡職，盡本分
    off duty 下班
    on duty 值班;上班
    dwell on 細(xì)想;詳細(xì)講述
    each other[互相(多用作賓語(yǔ))
    be all ears 全神貫注地傾聽著
    give ear to 聽，傾聽
    give one's ears 不惜任何代價(jià)(要)
    early or late 遲早
    keep early hours 早睡早起
    earn one's living 謀生
    on earth 在世界上;究竟，到底