He says, "I believe in the practice and philosophy of what we have agreed to call magic, in what I must call the evocation of spirits, though I do not know what they are."

他说我相信我们所称作的,关于魔法的实践和哲学，我认为那是对灵魂的召唤，尽管我并不知道它们是什么“

耶鲁公开课 - 现代诗歌课程节选

When you say "I must" what you mean is "I need to do something."

当你说 "I must"的时候，你是指“我必须得做某事。”

Must 课堂 - SpeakingMax英语口语达人

Ordinary soldiers do not attend, and that's one of the things I think we must grasp immediately.

普通士兵没有权力参加,这点是我们必须要记住的

耶鲁公开课 - 古希腊历史简介课程节选

Non-Western peoples who wish to share in the things that characterize modernity will need to study the ideas and history of Western civilization to achieve what they want, and westerners, I would argue, who wish to preserve these things must do the same.

希望分享西方现代特点的,非西方人士需要学习,西方文明的思想和历史,以实现自己的理想,而对西方,而我要说,那些希望,保留自身文明的西方人,也必须做相同的事

耶鲁公开课 - 古希腊历史简介课程节选