Mister Harrison had to develop a clock that was not affected by the movement of a ship on the ocean or changes in temperature or atmospheric pressure.

VOA: special.2010.07.14

Because a lot of these ships go blub on the way back, or are taken by pirates and stuff like that, they say, "We want to insure this ship.

因为有很多船只在回程的时候会损坏,或是被海盗之类的匪徒抢劫,他们说,"我们想为这船提供保险

耶鲁公开课 - 欧洲文明课程节选