1.talk about 谈论

What are you talking about?
你们在谈论什么?

We talked about that subject again.
我们又谈到那个话题。

2.by contrast 相比之下；与之相比

In the United States, by contrast, 41% goes for agriculture, almost all of it for irrigation.
与之相比，美国全年41%的水投向了农业，并几乎全都用在了灌溉上。

3.access to 接近；有权使用

You can turn on and off access to any of these groups.
您可以打开或关闭对任何这些组的访问。

Regardless of where we are and what we are doing, we want access to our data.
不管我们身在何处、在做什么，我们都想要访问到我们的数据。

4.provide for 供养，供给

The local government provided special buses for the guests.
地方政府为宾客提供了专车。

I'm sure that I shall be well able to provide for my wife and family.
我确信我将完全能养活我的妻儿老小。