I've taken this course six times.

角色扮演之后。

And further, rivers change their course all the time over a period of decades and centuries which also can obviously change their lengths over time.

此外，河流在几十年甚至几个世纪的时间里一直在改变它们的流向，这显然也会随着时间的推移而改变它们的长度。

Now, I have the opportunity to adjust the course of my spacecraft a few times along that trajectory, but in order to do that, I need to know where it is.

现在，我有机会沿着这条轨迹多次调整我的航天器的航向，但为了做到这一点，我需要知道它在哪里。

Concerned that she has no qualifications in these areas, she plans to gain the necessary skills by taking a part time course. But she still wonders if going into business is the right decision.

由于担心自己没有这些领域的资格，她计划通过参加兼职课程来获得必要的技能。但她仍然想知道创业是否是正确的决定。

I practice this with my students who've joined my course all the time and it's an extremely effective technique for both learning expressions and phrasal verbs and of course, improving that pronunciation at the same time.

我和我的学生一起练习这个方法，他们一直参加我的课程，这是一个非常有效的技巧，无论是学习表达和动词短语，当然，同时也提高了发音。