大学英语3的翻译内容如下：
Unit 1
1. 我们的计算机系统出了毛病，但我觉得问题比较小。
Our computer system has a problem, but I think it's fairly minor.
2. 父亲去世时我还小，不能独立生活。就在那时，
I was young when my father passed away and couldn't live independently. It was then that...
3. 这些玩具必得在达到严格的平安要求后才可以售给儿童。
The toys must meet strict safety requirements before they can be sold to children.
Unit 2
1. 让我们不要为小事情烦心。
Let's not bother about trivial matters.
2. （which）我们不应该忽略和忘记的事情。
Things which we should ignore and forget.
3. 花太多的时间老是想着过去，可能会妨碍我们享受生活。
Spending too much time dwelling on the past can get in the way of enjoying life as it is.
Unit 3
1. 我力求不存偏见，不过在雇用史蒂维时我有理由心存疑虑。
I try not to be prejudiced, but I have my reasons to be skeptical when hiring Steve. My employment consultant assured me that he would make an excellent and reliable restaurant hand. I have never employed someone with an intellectual disability before, and I was uncertain whether I should take him on. I was unsure how my customers would react.
Unit 4
1.永不言弃!
Never, ever give up!
2. 作为一名年轻的英国首相，温斯顿·丘吉尔曾就读于哈罗公学。
As a young boy, Britain's great Prime Minister, Sir Winston Churchill, attended a public school called Harrow.
以上是大学英语3的部分翻译内容。