under [ˈʌndə(r)]

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prep.在…下面；在…以下；adv.在下面；少于

in or to a position below or lower than something else , often so that one thing covers the other

Is it under your chair? 它在你的椅子下面吗？
Gosh! It's under a magazine! 我的天！在杂志下面。