additional

additional, extra, supplementary

这些形容词均有“另加的，额外的”之意。
additional: 由名词additon派生出的形容词，指在原有基础上添加上去的。
extra: 指不包括本身而额外加上去的部分。
supplementary: 由名词supplement派生而来，指对原有的追加或补究。

形容词 additional:

1. further or added
   同义词：extra

1. The scenery does not fill the space properly, we should set ton an additional piece here.
   这个布景没有很好地占据空间，我们应在这儿增设一个。
2. Additional material is overprinted in red.
   附加材料是用红色加印上的。
3. You should know the additional responsibilities that are incidental to the job.
   你该知道做这项工作要承担额外责任。
4. He had to pay some additional charges.
   他不得不付些附加费。