你那没用的儿子在哪儿?
她知道抗议是没用的。
阿兰大声威吓地对我们说,他不会浪费时间讨论这些没用的事情。
In a loud, hectoring tone, Alan told us that he wasn't going to waste time discussing nonsense.
So it was a little risky but safe in the end because I didn't do anything else with it.
所以它有点冒险但是最终是安全的,因为我没用它做其它的操作。
So just-- and we will come back to this and flush out some of these lower level details.
那么,我们还是回到这里,略去一些,没用的细节。
And you might say, wait a minute, isn't that a string, and the answer's no, I didn't say it's a string by putting quotes around it And notice how the machine responds differently to it.
你会想,等等,这不是个字符串么?,答案是否定的,我没用引号包围它就意味着它不是字符串,请注意计算机对它给出了不同的反应。
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