How long to be with Mom?

还能陪老妈多久：2个月？

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The timeout defines how long to wait before giving up on the connection to the server.

超时定义了要等多长时间才能放弃连接到服务器。

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For those hedge funds set on playing Europe, the main dilemma they face is how long to wait before buying.

对于那些准备久战欧洲的对冲基金公司来说，他们面临的最大困境是要等多久才能买入。

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They say it will help scientists better understand how to protect long-beaked echidnas and the areas where they live.

VOA: special.2009.07.07

But I don't really know about how long it would take people to hack, like, the general firewall

但我不知道人们具体要用多长时间才能穿过防火墙，

理想是当密码专家 - SpeakingMax英语口语达人

Said a different way, in the case of the straight-line programs, how long would it take to run a program?

换种说法，在直线式程序里面，运行一个程序要多长时间？

麻省理工公开课 - 计算机科学及编程导论课程节选

"A lot of people don't know how long to cook salmon, " Ms. Erickson said.

WSJ: Renee Erickson's Roast Salmon With Saut��ed Radishes and Sorrel Cream

But, no, it took a long time to figure out how long to stir, how fast to stir.

WSJ: From Patents to Memberships, Coffee Shops Offer New Perks

By mid-week the urgent question was how long to stay in the square.

ECONOMIST: Another meaningless victory for the president of Belarus