1. （用于存放食物的有盖的）玻璃罐，罐子， 坛子，广口瓶
    A jar is a glass container with a lid that is used for storing food.

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    e.g. ...yellow cucumbers in great glass jars.
           存放在大玻璃罐里的黄瓜

2. 一罐，一坛（的量或物）
    You can use jar to refer to a jar and its contents, or to the contents only.

jar在线翻译

    e.g. She opened up a glass jar of plums.
           她打开了装满梅子的玻璃罐。
    e.g. ...two jars of filter coffee.
           两罐滴漏式咖啡

3. 一杯酒
    If you have a jar, you have a drink with friends in a pub.

    e.g. They had a few jars together.
           他们一起喝了几杯。

4. 令人不快；使人不安；让人震惊
    If something jars on you, you find it unpleasant, disturbing, or shocking.

    e.g. Sometimes a light remark jarred on her father.
           有时候一句玩笑就会令她父亲不快。
    e.g. ...televised congressional hearings that jarred the nation's faith in the presidency...
           电视里播放的动摇了全国人民对总统信心的国会听证会

5. （使）震动；（使）摇动
    If an object jars, or if something jars it, the object moves with a fairly hard shaking movement.

    e.g. The ship jarred a little...
           船微微震动了一下。
    e.g. The impact jarred his arm.
           冲击力震伤了他的胳膊。