Mrs. Thompson got two more letters from him with the last one signed, Theodore F Stoddard, M. D. (医学博士).
汤普森夫人又收到了他的两封信，最后一封的署名是：西奥多·F·斯托达德，医学博士。
"But I saw him," said the woman. "I remember the letters F. C."
“我看到他拿走了，”妇女说道，“我记得字母是F.C。”
Then I switched on a projector that flashed the letters F, Z and B on a screen.
然后，我打开一台投影仪，在一个屏幕上闪出了字母F、Z和B。
In the A, B, C, D and F grading system, the first four letters are typically considered passing grades.
在A、B、C、D和F评分体系中，前四个字母通常被认为是及格。
There are also photographs and detailed diagrams of supposed alien spaceships that some U. F. O. spotters helpfully included with their letters.
这里还有图片和详细的图表关于外星人的飞船，甚至还有他们给我们的信。
printf Well, notice I'm calling print F with percent C, and then I'm printing out each of these letters one at a time.
好的，请注意我用%c来调用，然后我打印出一个一个打印出这些字符。
In 1832 Samuel F. B. Morse made sketches of ideas for a system of electric telegraphy, and in 1835 he developed a code to represent letters and Numbers (Morse code).
1832年摩斯为电报系统勾画出了轮廓，1835年他研制出一套代表字母和数字的代码(摩斯密码)。
This function generates a random string composed of letters a to f, Numbers and hyphens and unnecessarily restricts the key space, resulting in a weakening of the entropy.
该函数生成由字母a至f，数字和连字符组成的随机字符串，并且不必要地限制关键字空间，导致熵的削弱。
This function generates a random string composed of letters a to f, Numbers and hyphens and unnecessarily restricts the key space, resulting in a weakening of the entropy.
该函数生成由字母a至f，数字和连字符组成的随机字符串，并且不必要地限制关键字空间，导致熵的削弱。
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