extra
单词辨析：
指在原有基础上添加上去的。
an additional charge
额外收费
Our factory will create an additional 120 jobs.
我们的工厂将创造120个额外的工作机会。
指具体事物、数量等是额外加上的。
Our apartment is small, and has the added disadvantage of facing west.
我们的公寓很小，还有个缺点是朝西。
The added wood is to increase the fire.
添加木材会使火烧得更旺。
指不包括本身而额外加上去的，只作定语。
Allow extra time for your review.
要留出更多的复习时间。
He wanted an extra loaf of bread.
他想多要一条面包。
相关例句：
It involved a little extra work, but nobody seemed to mind.
这稍微增加了一些工作量，不过似乎没有人介意。
Running shoes have extra cushioning.
跑鞋有额外的减震设计。
Your wedding ring can be engraved with a personal inscription at no extra cost
可以免费在你的婚戒上刻上你的题字。
Optional extras include cooking tuition at a top restaurant
可选的额外项目包括在顶级餐厅学习厨艺。
There's an extra blanket in the bottom drawer of the cupboard.
壁橱最下面的抽屉里还有一条多余的毯子。
An extra 700 jobs are being cut on top of the 2,000 that were lost last year.
除了去年被裁掉的2,000个职位，还有700个岗位在裁撤中。