A chronometer is a clock built to stay extremely exact — not “about the right time,” but right to a tiny part of a second, even after many hours.

chronometer精密計時器 is是 a clock一種鐘 built打造得 extremely exact極度精準 — not不是 about the right time大概對的時間 but而是 right to精準到 a tiny part of a second一秒的極小部分, even after即使經過 many hours很多小時

Scientists use that kind of clock, and sailors once lived by it: at sea, if your clock drifted, you could not tell how far east or west you were, and ships were lost that way.

Scientists科學家 use用 that kind of clock這種鐘, sailors水手 once lived by it以前靠它維生: at sea在海上 if如果 your clock你的鐘 drifted走偏了, you could not tell你就無法知道 how far east or west你在多東還是多西, and而 ships船隻 were lost因此而失蹤 that way

So this is not a fashion watch, not a kitchen timer, and not the stopwatch on a sports watch.

So所以 this這 is not不是 a fashion watch時尚手錶, not不是 a kitchen timer廚房計時器, and也 not不是 the stopwatch碼錶 on a sports watch運動錶上的

It is a serious measuring tool that happens to measure time, and the word still sounds formal and technical. People stretch it a little for any instrument they trust to keep time with almost no error, but the home of the word is science and navigation.

It它 is是 a serious measuring tool一種嚴肅的測量工具 that happens to measure time剛好用來測量時間, and而 the word這個詞 still sounds仍然聽起來 formal and technical正式又專業. People人們 stretch it延伸用它 a little稍微 for在 any instrument任何儀器 they trust他們信任 to keep time計時 with almost no error幾乎不會出錯, but但 the home of the word這個詞真正的家 is是 science and navigation科學和航海