vt.

1. 添加；增加[（+to）]
   The fire is going out; will you add some wood?

   火快熄了，请你加些木柴好吗？

2. 将……相加[（+up/together）]
   If we add these marks up, we'll get a total of 90.

   如果我们把这些分数加起来，总数就有九十分了。

3. 补充说[Y][+that]
   "I felt sorry for her," Bob added.

   “我为她感到惋惜，”鲍勃又说道。

vi.

1. 增加[（+to）]
   The snowstorm added to our difficulties.

   暴风雪增加了我们的困难。

2. 做加法；加起来
   The little girl has begun to learn to add and subtract.

   这小女孩已在学做加减法了。

v.

1. join to or put with something else.
2. put together (two or more numbers or amounts) to calculate their total value.
   ▸ (add up) increase in amount, number, or degree.
   ▸ (add up to) amount to.
3. (add up) informal make sense.
4. say as a further remark.