a component that is added to something to improve it;
"the addition of a bathroom was a major improvement"
"the addition of cinnamon improved the flavor"
a supplementary component that improves capability
According to the features of the applications,the paper provides a way to add parity packets so as to realize reliable multicast communications. 针对这类应用系统的特点，本文提出使用追加校验包来达到可靠多址通讯的目的。
If the stock market plunges and you own shares on margin, you could receive a margin call from your broker, asking that you add more cash or securities to your account. 如果股市下跌，而你拥有通过保证金购买的股票，你就会收到经纪商追加保证金的要求，让你向帐户中追加资金或是股票。
You should run on an adverb to the verb. 你应在这动词后附加一个副词。
Add to Handwheel Actuated Valve weight. 附加在手轮操作阀门上的重量。