It's a much more elaborate simile than that: "the broad circumference / hung on his shoulders like the Moon whose Orb / through Optic Glass the Tuscan Artist views.

这是一个更为精细的比喻：,“那个阔大的圆形物/好像一轮挂在他双肩的明月“,/就是那个托斯卡纳的大师“

耶鲁公开课 - 弥尔顿课程节选

I have to have a whole number of wavelengths to get around the circumference.

我必须要有个关于波长的总体数字,测量周长。

麻省理工公开课 - 固态化学导论课程节选

who will help me out？ They find themselves surrounded, and Paris is--it's nothing like- - it's one-third the size of London at this same time, or at any other time, but it has a huge circumference.

谁来帮我下,他们发现自己被包围了,巴黎成为,巴黎已经大不如前,它仅仅相当于,当时或其他时期伦敦规模的三分之一,还是一个巨大的牢笼

耶鲁公开课 - 1871年后的法国课程节选

r So the circumference is 2 pi r.

周长=2π

麻省理工公开课 - 固态化学导论课程节选