“附加的”用英语怎么说

“附加的”的拼音为：...

我有一把锁,可是另外又买了一把作为附加的防盗保障.I have one lock but I bought another as an additional insurance against thieves.这些附加的离子叫做填隙式离子.These additional ions are called interstitial ions.一种附加的描述性的解释或说明性注解.An added descriptive comment or...