add-on

劍橋詞典

a piece of equipment that can be connected to a computer to give it an extra use
（電腦）附加設(shè)備，附件
A printer is a useful add-on. 打印機(jī)是個(gè)很有用的電腦附加設(shè)備。

an extra part that is added , especially to an officially organized plan , system , agreement , etc.
（尤指正式計(jì)劃、制度、協(xié)議等的）附加部分，附加項(xiàng)目
Legal expenses cover is often sold as an add-on to household insurance policies . 訴訟費(fèi)用險(xiǎn)經(jīng)常作爲(wèi)家庭財(cái)産保險(xiǎn)的附加險(xiǎn)出售。 返回 add-on