I'm sure they sold it in various forms, but one of the most popular was for this purpose.

我确信他们出售各种用途的橄榄油,但最普遍的还是作为清洁工具

耶鲁公开课 - 古希腊历史简介课程节选

But in the United States, I would say, most definitely, my favorite city, my favorite place I've ever been.

但我十分确信，在美国，在我去过的城市和地方中，我最喜欢纽约。

纽约的人们 - SpeakingMax英语口语达人

It's perfectly inscrutable as far as I'm concerned. But I think I can say with absolute certainty that one of its possible significances cannot be that the unprofitable servant should have waited to make his investment.

这对我来说很神秘，但我可以说,我很确信,它可能的含义之一,不会是让那个无益的仆人去等。

耶鲁公开课 - 弥尔顿课程节选

And when you reread this poem and you look at it in your discussion section, you may want to think about the tenses it sounds tedious but I am convinced that it's not tedious the tenses of the verbs that Milton's using.

当你重新读这首诗,并在讨论时再看它的时候，你可能会思考它的时态,这听起来很乏味，但我确信,弥尔顿用的动词的时态一点都不乏味。

耶鲁公开课 - 弥尔顿课程节选