你几乎可以听到钟表滴答滴答的指针。

You can almost hear the ticking.

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一月一日在南极，钟表开始计时，发出滴答的声响。

The clock started ticking at the South Pole on January 1.

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将两根电极连接到一只活蟑螂的腿上(标配)；每当蟑螂抽动时，它的神经元便会发出一束电尖峰脉冲并转化为滴答的声音。

Connect two electrodes to the leg of a live cockroach (included); every time the bug twitches, its neurons emit an electrical spike that translates into a loud click.

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We get used to the ticking of a clock or to noise of traffic but it's actually a very important form of learning because imagine life without it.

我们习惯了钟的滴答声和车来人往的噪音,但这却是一种非常重要的学习形式,我们不妨试想一下无法进行习惯化的情形。

耶鲁公开课 - 心理学导论课程节选