"There are some things that when you operate in the 'cloak-and-dagger' world of the intelligence community, that need to remain within the intelligence community,"

VOA: standard.2009.04.20

A kind of a pin used to hold your cloak together, called a fibula, unknown in the previous period.

一种别住披风的别针,称之为扣针,这在之前的时期从未出现过

耶鲁公开课 - 古希腊历史简介课程节选

And because the experimenters were saying the experiment must go on and very often had a white cloak like doctors or experimenters-- a cloak around them.

因为实验者说实验必须进行下去,而且实验者经常穿着一件白大褂-,就像医生或者实验者。

哈佛公开课 - 幸福课课程节选