People use a metal call box with a push-to-talk button to connect to a live operator, as Rose Shuman explains: "You just push a button, a big green button, and that will connect you directly to our operators who are sitting in front of computers, and speak your language.
VOA: special.2009.10.12
My friend Nassim Talib has just written a book about it called-- maybe I'll talk about that--called The Black Swan.
我的朋友纳西姆·塔利博刚刚写了一本书,叫做"黑天鹅现象",以后我会再讲到
Let's talk to the Beta's a second; let me just emphasize at this stage there are no wrong answers.
我们先来讨论一下选β的理由,我要强调一下这里没有错误的答案
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