它只意味着在某段时间内你可以选择自己所要学的。

It means only that you may elect what you want to take at a given time.

youdao

通过锁定会议，Bob可以阻止参与者在某段时间内加入到会议中。

Bob can prevent participants from joining the meeting for a period of time by locking the conference.

youdao

值得强调的一点就是在某段时间内，成功的重力中心从顶尖的学校发生了转移。

The point is that for some time the center of gravity for achievement has been shifting away from the topmost colleges.

youdao

Now we're going to compare high glycemic index foods with low glycemic index foods, and so the curve of blood sugar with high glycemic index foods, those that create an exaggerated blood sugar response over a period of time might look like this.

现在我们要对高血糖指数的食物和,低血糖指数的食物进行对比,那些高血糖指数食物所形成的曲线,那些会在某段时间内产生过高血糖的食物,所形成的曲线看起来可能就是这样的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选