用双手与他握手，并且在放开手之前数三秒。

Cover both hands with your free hand, and count off three seconds before releasing.

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装配奶泵之前，请先彻底洗手10到15秒，用干净的毛巾或者纸巾擦干你的手。

Before assembling your breast pump, wash your hands thoroughly for at least 10 to 15 seconds, and dry them with a clean cloth or paper towel.

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抬头看手，保持20秒钟，然后放松。

Look up at your hands. Hold for 20 seconds, then relax.

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John Landy Six weeks later, John Landy, the Australian runner, runs the mile in 3 minutes 57.9 seconds.

六周后，澳大利亚跑手，一英里跑了三分57。9秒。

哈佛公开课 - 幸福课课程节选

And runners proved the doctors and scientists-- proved that they were right and ran the mile in two seconds and 4 minutes, one second, but no runner could run the mile in under 4 minutes, ever since the mile was actually timed-- when they started to time runs.

跑手们证明了医生和科学家…,证明了他们是对的,一英里跑四分钟两秒，四分钟一秒，但没有跑手能少于四分钟，从一英里跑计时以来-,当人们开始计时跑时。

哈佛公开课 - 幸福课课程节选