“外加的”用英语怎么说

“外加的”的拼音为：...

联机安全措施正被內置在系统中, 不是外加的.Online security is being built in to the system, not tagged on.这是外加的东西.This is sth. additional.细胞丧失了自养的特性,变成依赖于外加的化学能源生活.The cell lost its autotrophic character and became dependent on added chemica...