I thought i dialed a wrong number, then the second time,i just got to hear an boring music, and no response for about 5 mins (just the music).
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The second option also involved going over to the shelf but, this time, removing the book and then subtly holding onto it for just an extra moment before placing it in the customer's hands.
第二种选择是走到书架前,但是这次,把书拿开,然后稍微多拿一会儿,再把书放到顾客手中。
If you say 20 milliseconds, you might get called in 25 milliseconds one time, then a second later the next time.
如果规定20毫秒,但实际上可能第一次在25毫秒时调用,下一次却要等到一秒钟以后。
The first step uses a bit of influenza DNA to get the patient's immune system to begin fighting off the flu, and then the protection is given a "boost" some time later by the second step, which can be either another bit of DNA or a conventional flu vaccine.
VOA: standard.2010.07.21
I don't know where that is, that disappeared on the blackboard, then putting the time equal to 1 second into this formula.
我不知道我写在哪儿了,已经不在黑板上了,然后把时间等于1秒代入方程
Today we'll do the first way, and then next time we'll do the second way.
证明这个式子,今天讲一个,下次再讲一个。
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