e from 缺席,不在 如:

His long absence from work delayed his promotion.
他长期不上班,耽误了提升。

2. absence of 缺乏 如:

In the absence of my commanding officer, I acted on my own initiative.
指挥官不在场,我主动见机行事。
In the absence of their teacher the class was in a state of anarchy.
教师不在,班上一片混乱。

3. access to ……的入口,通路 如:

The only access to the farmhouse is across the fields.
要到那农舍去唯有穿过田地。
She was forbidden access to the club.
人家不允许她到那个俱乐部去。

4. acquaintance with 相识,了解 如:

I have only a nodding acquaintance with Japanese.
我对日语仅略知一二。
The guide has some acquaintance with Italian.
导游懂得一点意大利语。

5. action on sth 对……的作用 如:
evidences of glacial action on the rocks
岩石上的冰河留下的痕迹

6. addition to sth 增加 如:

She is a beautiful addition to the family.
她是我们家漂亮的新成员。
Can we finance the addition to our home?
我们可以为你提供经费。

7. admission to /into 进入;入(场,学,会等) 如:

How does one gain admission to the Buckingham Palace?
怎样才能获准进入白金汉宫?
Admission to British universities depends on examination results.
英国大学入学以考试成绩为凭。

8. admission of sth 承认  如:

His admission of guilt surprised everyone.
他供认犯罪使大家感到意外。
The write of the letter is ipso facto an admission of guilt.
写此信的本身就是一种认罪。

9. advance in 改进,进步,如:

an advance in genetic engineering
遗传工程学方面的进展
to advance in years
年纪增长

10. advantage over 优于……的有利条件  如:

Now we have won an advantage over the enemy.
我们现在经赢得了对敌人的优势。