1. 龙头;阀门;旋塞
    A tap is a device that controls the flow of a liquid or gas from a pipe or container, for example on a sink.

    e.g. She turned on the taps.
           她打开了那些龙头。
    e.g. ...a cold-water tap...
           冷水阀

2. 轻打;轻拍;轻叩
    If you tap something, you hit it with a quick light blow or a series of quick light blows.

    e.g. He tapped the table to still the shouts of protest...
           他敲了敲桌子，以平息抗议的喧闹声。
    e.g. Tap the eggs gently with a teaspoon to crack the shells...
           用茶匙轻敲鸡蛋，让蛋壳开裂。

3. (尤指听音乐时，用手指或脚)敲节拍，打拍子
    If you tap your fingers or feet, you make a regular pattern of sound by hitting a surface lightly and repeatedly with them, especially while you are listening to music.

    e.g. The song's so catchy it makes you bounce round the living room or tap your feet.
           这首歌很动听，听着它你就会不由自主地在客厅里舞动，或是用脚打拍子。

4. 开发，发掘，利用(资源、形势)
    If you tap a resource or situation, you make use of it by getting from it something that you need or want.

    e.g. He owes his election to having tapped deep public disillusion with professional politicians...
           他将自己的当选归因于充分利用了公众对于职业政治家们不再抱希望的心情。
    e.g. The company is tapping shareholders for £15.8 million...
           公司要向股东募集 1, 580 万英镑。

5. 偷听，窃听，监听(电话)
    If someone taps your telephone, they attach a special device to the line so that they can secretly listen to your conversations.

    e.g. The government passed laws allowing the police to tap telephones...
           政府通过了允许警方监听电话的法令。
    e.g. We suspected the telephone line was tapped.
           我们怀疑电话遭人窃听了。

6. (饮料)散装的，可随时(打开旋塞)取饮的
    If drinks are on tap, they come from a tap rather than from a bottle.

    e.g. Filtered water is always on tap, making it very convenient to use.
           随时打开龙头都有过滤水，用起来很方便。

7. 可轻松获取;可随时使用
    If something is on tap, you can have as much of it as you want whenever you want.

    e.g. The advantage of group holidays is company on tap but time alone if you want it.
           团体度假的好处在于，要找人陪伴非常容易，想要独处也行。

相关词组：tap out