Lack, however, suggested that clutch size—the number of eggs a bird lays per breeding cycle—is far below the potential limit of egg production.

然而，缺乏情况表明卵的大小——每一个繁殖周期下的蛋的数量——远低于产蛋的潜在限制。

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Washables can have a lower carbon footprint, but only if you have an energy-efficient washing machine, use a 60-degree wash cycle, limit yourself to 24 nappies, and don't tumble dry or iron them.

只有在你有一个高能效的洗衣机，使用60度洗衣周期，限制在24片尿布以内，不要甩水和熨干的情况下，可洗尿布的碳足迹才会相对比较低。

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The existence of a limit cycle was proved.

证明了极限环和周期解的存在性。

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