These questions are not easy to answer, I know. But they are definitely worth pondering over after the lecture.

我知道这些问题不容易回答。但这些问题绝对值得在讲座结束后认真思考。

He was sitting alone one evening pondering deeply over his troubles, and searching vainly for some way out of them.

一天晚上，他独自一个人坐着，千思万虑地盘算着他的心事；但是左思右想，总想不出什么办法可以逃脱这场灾难。

We've all found ourselves pondering over this question, why is life so hard?

我们都发现自己在思考这个问题， 为什么生活如此艰难？

But they are definitely worth pondering over after the lecture.

但在讲座结束后，它们确实值得深思。

But Jo had made up her mind, and after pondering over a project for some days, she confided it to her mother.

但乔已经下定决心，在对一个项目思考了几天之后，她向母亲吐露了心声。

He turned it about in his mouth much longer than usual, pondering over it a good deal, and after all gulped it down like a pill.

他嘴里转来转去的时间比平时长得多， 沉思着， 毕竟它像药丸一样吞咽着。

At all events, he was still pondering over the problem in 1910, when he tried to deal with it in another way which might be more intelligible to students.

无论如何，他在1910年还在思考这个问题，当时他试图用另一种可能更容易被学生理解的方式来处理它。

He was depressed and sad at this partial cessation of an intercourse which had become dear to him; and he used to sit pondering over the reason that could have occasioned this change.

他对这种对他来说很重要的交往的部分中断感到沮丧和悲伤；他常常坐下来思考可能导致这种变化的原因。

" Have you had a pleasant day" ? asked Rose, looking at him intently as he stood pondering over the cigar and match which he held, as if doubtful which to strike and which to smoke.

“你今天过得愉快吗” ？罗斯问，当他站在那里思考他拿着的雪茄和火柴时， 他专心地看着他， 好像在犹豫要抽哪一个。