通常，一百个样本要花费实验技术员超过两天的时间来检测，但是一只老鼠只需要花费不到二十分钟。

Traditionally, a hundred samples would take lab technicians more than two days to examine, but for a rat it takes less than 20 minutes.

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经过两天的时间，他们到达了目的地。

After two days, they arrived destination.

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最好的时间表是每隔一天跑一次，但在任何情况下，别超过两天不跑步。

The best schedule is to run every other day but in any case do not spend more than two days without running.

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