1. 附加元件：IE浏览器停止回应最常见的原因是浏览器上的附加元件(Add on)匹配性造成,您可以一一停用这些附加元件,以确认问题原因.

2. 插入：add key 加法键 | add on 插入 | add on memory 插入存储器

3. 附加利益;优惠：ad valorem stamp duty 从价印花税 | add-on 附加利益;优惠 | additional AMS terminal user 附加自动对盘终端机用家

1. （尤指计算机的）附加装置，外挂，插件
    An add-on is an extra piece of equipment, especially computer equipment, that can be added to a larger one which you already own in order to improve its performance or its usefulness.

add-on是什么意思

    e.g. Speakers are sold as add-ons for personal stereos...
           扬声器作为随身听的附加装置出售。
    e.g. Nintendo hopes to price the add-on modem at less than $200.
           任天堂希望将该外挂调制解调器的价格定在200美元以下。

1. a supplementary component that improves capability

    Synonym: accessoryappurtenancesupplement

2. a component that is added to something to improve it

    e.g. the addition of a bathroom was a major improvement
           the addition of cinnamon improved the flavor

    Synonym: additionimprover