短语讲解：

1. To mark the occasion, Kelly took time out to talk with two cast members from the upcoming movie, “The Martian.”

talk with 与…交谈，想说服
例句：He had a long talk with me yesterday.
他昨天和我谈了很长时间。

2. The experiments focus on seven areas of investigation.

focus on 致力于; 使聚焦于
例句：We must focus on increasing our home markets.
我们必须把注意力放在拓宽国内市场上。

3. They also will look at the differences in how the two men’s bodies differ after a year of weightless for one while the other remained on the ground.

look at 看; 审视; 评判
例句：Look at your son!
看看你的儿子吧！