1. 在…下面；在…底下
    If one thing is underneath another, it is directly under it, and may be covered or hidden by it.

    e.g. The device exploded underneath a van.
           該裝置在一輛貨車底下發(fā)生了爆炸。
    e.g. ...using dogs to locate people trapped underneath collapsed buildings.
           利用狗來尋找被困在倒塌的樓房下面的人

2. 在下表面；在底面
    The part of something which is underneath is the part which normally touches the ground or faces towards the ground.

    e.g. Check the actual construction of the chair by looking underneath...
           看看椅子的下面，檢查一下它的實(shí)際構(gòu)造。
    e.g. The sand martin is a brown bird with white underneath...
           崖沙燕是一種褐羽白腹的鳥。

3. 在內(nèi)心深處；心底里
    You use underneath when talking about feelings and emotions that people do not show in their behaviour.

underneath的反義詞

    e.g. He was as violent as Nick underneath...
           在內(nèi)心深處，他和尼克一樣暴躁不安。
    e.g. Underneath, Sofia was deeply committed to her husband.
           索菲婭從內(nèi)心里對丈夫忠貞不貳。