1. We heard a hollow boom of thunder.
    我们听到低沉的隆隆雷声。

2. His speech rang hollow.
    他的发言听上去很空洞。

3. A water pipe is hollow.
    水管是空心的。

1. They hollowed out a log.
    他们把一根原木挖空。

1. We filled the hollow in the drive.
    我们把车道上的坑填平了。

2.

2. The cottage is in that hollow.
    村舍在那片洼地。

1. 空的：所以TEM模式只能在同轴缆线或双芯线(two-wire line)等多导体中被传导. 中空的(hollow)波导(waveguide)并不支持TEM模式. 图二是一个双导体传输线的横向截面积. 此截面的外形是任意的.

2. 中空：Block是一个三维的模型,几何形状有棱柱、圆柱、三维的多面体、椭圆体和椭圆型圆柱体,Blocks(块)类型有三种:实体的(solid)、中空(hollow)的和流动(fluid)的.

1. 空的;空心的;中空的
    Something that is hollow has a space inside it, as opposed to being solid all the way through.

    e.g. ...a hollow tree.
           空心的树
    e.g. ...a hollow cylinder.
           中空圆筒

2. 凹的;凹陷的
    A surface that is hollow curves inwards.

    e.g. He looked young, dark and sharp-featured, with hollow cheeks.
           他看起来很年轻，肤色黝黑，五官分明，双颊凹陷。

3. 树洞
    A hollow is a hole inside a tree.

hollow是什么意思

    e.g. I made my home there, in the hollow of a dying elm.
           我在一棵快要枯死的榆树的树洞里安了家。

4. 凹陷处;低洼地
    A hollow is an area that is lower than the surrounding surface.

    e.g. Below him the town lay warm in the hollow of the hill.
           在他下方，小镇卧在温暖的山谷里。
    e.g. ...where water gathers in a hollow and forms a pond.
           在那里水积聚在低洼处形成了池塘

5. 空洞的;无用的;无价值的
    If you describe a statement, situation, or person as hollow, you mean they have no real value, worth, or effectiveness.

    e.g. Any threat to bring in the police is a hollow one.
           任何威胁说要叫警察来的话都是虚声恫吓。
    e.g. ...a hollow man who''s coasted on charm for far too long.
           长久以来一直依靠个人魅力取胜的肤浅之人

6. （笑声等）虚伪的，不真诚的
    If someone gives a hollow laugh, they laugh in a way that shows that they do not really find something amusing.

    e.g. Murray Pick''s hollow laugh had no mirth in it.
           默里·皮克的干笑里没有一点快乐。

7. （声音）空洞的，沉闷回荡的
    A hollow sound is dull and echoing.

911查询·英语单词

    e.g. ...the hollow sound of a gunshot.
           空洞的枪响

8. 使凹陷;使下陷
    If something is hollowed, its surface is made to curve inwards or downwards.

hollow是什么意思

    e.g. The mule''s back was hollowed by the weight of its burden.
           骡背被重负压得塌下了。
    e.g. ...her high, elegantly hollowed cheekbones.
           她凹陷有致的高颧骨

相关词组：hollow out

1. a depression hollowed out of solid matter

    Synonym: hole

2. a small valley between mountains

    e.g. he built himself a cabin in a hollow high up in the Appalachians

    Synonym: holler

3. a cavity or space in something

    e.g. hunger had caused the hollows in their cheeks

1. remove the interior of

    e.g. hollow out a tree trunk

    Synonym: hollow outcore out

2. remove the inner part or the core of

    e.g. the mining company wants to excavate the hillside

    Synonym: excavatedig

1. devoid of significance or point

    e.g. empty promises
           a hollow victory
           vacuous comments

    Synonym: emptyvacuous

2. as if echoing in a hollow space

    e.g. the hollow sound of footsteps in the empty ballroom

3. not solid
    having a space or gap or cavity

    e.g. a hollow wall
           a hollow tree
           hollow cheeks
           his face became gaunter and more hollow with each year