This is titanium sponge that comes out of the bottom of this reactor, and it subsequently re-melted in a vacuum arc furnace.

海绵状的钛,从反应器的底部出来，随后在真空炉中重新熔炼。

麻省理工公开课 - 固态化学导论课程节选

What we could also call "the narrative arc of your life" matters.

我们也可以称之为“生命叙事线。

耶鲁公开课 - 死亡课程节选

The particle is moving along this arc.

物体沿着这条曲线运动

耶鲁公开课 - 基础物理课程节选

Peddlers who had these big, big leather bags that would go around Europe and sell things like pins and miraculous images of the Virgin Mary and the stories of saints and all this kind of stuff and Joan of Arc or Robin Hood, in the case of England, become part of the collective memory.

拿着大皮袋的小贩们走遍欧洲,到处贩卖例如胸针,圣母画像,圣徒故事,圣女贞德和罗宾汉之类的小册子,这成了英国大众记忆的一部分

耶鲁公开课 - 欧洲文明课程节选

The narrative arc, as I put it.

生命叙事线，这是我对它的称谓。

耶鲁公开课 - 死亡课程节选