Look at the second hand of a watch.

看着表的秒针。

youdao

A watch has three hands ---- the second hand, minute hand and hourhand.

手表有三根指针--秒针，分针和时针。

youdao

A watch has three hands -- the second hand, minute hand and hour hand.

手表有三根指针--秒针、分针和时针。

youdao

Well, if you have ever observed how the second hand of a mechanical watch moves, you know that it appears to run smoothly (in stark contrast to the second hand of a quartz watch, which makes a little jump once a second).

FORBES: The Slowest Watch in the World

The second explains how to do what Daniels did: make a watch by hand entirely alone.

WSJ: Watch Making's Self-Taught Genius | Michael Clerizo on George Daniels

For his tourbillon, the watch that put Journe on the map, Journe added so-called deadbeat seconds: The second hand doesn't glide but hops from one second to the next.

FORBES: Magazine Article