Even the most reliable waterpower varied with the seasons and disappeared in a drought.

即使是最可靠的水力也会随着季节变化，也会因干旱而消失。

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Day and night were divided into the same number of parts, so that except at the equinoxes, days and night hours were unequal; and then of course the length of these hours varied with the seasons.

白天和黑夜被分为均等数量的部分，所以除去昼夜平分点，白天和黑夜时间是不等的；当然，这些时长也因季节变化而变化。

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(The percentage varied with each food.)

(这个百分比会随着每种不同的食品而变化。)

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Carbohydrates were held steady at about 41% to 42% of calories while fat levels varied with the protein regimen.

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Mr Pallot said previously there had been a lot of interference from coasts and hills, which varied with the weather.

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The dominant players in the machine tool industry have varied with the rise and fall of industrial manufacturing by country.

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