1[VERB 动词]添加；增加；掺加 If you add one thing to another, you put it in or on the other thing, to increase, complete, or improve it.

[V n to n]

[be V-ed to n]

[Also V n]

2[VERB 动词]加 If you add numbers or amounts together, you calculate their total.

[V pl-n with together]

[V P]

[V pl-n P]

3[VERB 动词]增添；增加 If one thing adds to another, it makes the other thing greater in degree or amount.

[V to n]

This latest incident will add to the pressure on the government...
最近的这次事件将会给政府增加压力。
Smiles, nods, and cheerful faces added to the general gaiety.
微笑、点头和喜洋洋的脸庞使喜庆的气氛变得更浓了。

4[VERB 动词]增加，增添（特色） To add a particular quality to something means to cause it to have that quality.

[V n]

[V n to n]

5[VERB 动词]补充说；进一步说 If you add something when you are speaking, you say something more.

[V with quote]

[V that]

[V n]

'You can tell that he is extremely embarrassed,' Mr Brigden added...
“你能看出他尴尬极了，”布里格登先生补充道。
The President agreed, adding that he hoped for a peaceful solution.
总统表示赞同并补充说他希望和平解决。
Hunt added his congratulations, saying 'Nigel has made a cracking job of it'.
亨特在致完贺词后又补了一句：“奈杰尔干得棒极了。”

6[PHRASE 短语]另外；再者 You use added to this or added to that to introduce a fact that supports or widens what you are saying.

[V inflects]

More than 750 commercial airliners were involved in fatal accidents last year. Added to that were the 1,550 smaller aircraft.
去年750多家商业航空公司遭遇过人员死亡的事故。另外还有1,550架小型飞机也出过同样的事故。

7 to add insult to injury→see: insult；