这些词汇和另一个已知词汇组合，将图像扭曲，并加上一些多余的线增这些词的辨认难度，这样来产生一组验证码。
Such words are used to generate a CAPTCHA by combining them with a known word, skewing the image and adding extra lines to make the words harder to read.
只要夜空明朗，你可以测量出从某颗已知的星星到北方或者南方的水平线并在纬度上得到准确的方位。
As long as the night was clear you could measure the distance from certain known stars to the northern or southern horizon and get an accurate fix on your latitude.
毋庸置疑，是个抛物线，用我刚才得到的，这个已知信息。
It's, of course, a parabola and I use this information that we have just derived.
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