3：Bob! Hey, Bob, wake up! It's already 9:30 and you've got that big math test at 10 o'clock. Come on, man, shake a leg! Come on, - you've got to get moving right now!
他使劲叫醒Bob，因为已经到九点半了，而Bob十点有数学大测验。时间紧迫，所以他要Bob必须立刻行动起来。 显然他说shake a leg，是催促Bob赶快行动。这就是这个习惯用语的意思。
It's true that nobody has any good idea of how to test string theory, but who's to say someone won't wake up tomorrow morning and think of one?
确实，怎样检验弦理论，现在没有什么好主意，但是谁又能说某人明早醒来时不会想出一个好主意呢？
Life has a way of playing these tricks on us as a test and a challenge to wake up and live our lives.
生活有自己的办法戏弄我们，像个测验又像个挑战，催人醒悟，让人面对生活。
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