If the monkeys touched the left side of the screen they would be rewarded with seven drops of water or juice.

如果猴子摸的是屏幕的左边，他们会得到七滴水或果汁的奖励。

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As a timepiece, it's comparable to digital watches circa 1978: the screen is usually in a black, juice-conserving state, so to check the time you need to press the power button.

作为一个计时器，它和1978年左右的电子表差不多：屏幕平时是黑的，好像在保存果汁一样，所以你需要按下电源按钮才能查看时间。

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