I still get nervous before every single lecture, which is actually a good thing. But it's managable.

每次上课前，我仍会感觉紧张，其实这是件好事，它可以控制。

哈佛公开课 - 幸福课课程节选

Or perhaps, you could be trying to explain that you don't know whether you can do something or not by a certain date.

又或者，你正在试图解释你没法确定你是否能在一个指定日期前做完某件事。

I don't know 课堂 - SpeakingMax英语口语达人

Because she was he's old girlfriend. And he is very sad to have lost her.

因为准新娘是他的前女友。而失去她，对于他来说是一件痛苦的事。

When 课堂 - SpeakingMax英语口语达人

I could maybe buy one before we go.

在我们出发前，我也许可以去买一件。

The thing is 实战 - SpeakingMax英语口语达人

Actually, I was thinking about this the other day.

其实，我前几天还想到一件事。

普林斯顿公开课 - 人性课程节选