Turning one around, she could read "Nikon" on the viewfinder and, just to the upper left of the Nikon label, the letter F. It was the camera she had handed him at Cedar Bridge.
她把其中一架转过来，在取景器上有“尼康”字样，商标的左上角有一个“F”，她在杉树桥递给他的那架相机。
The letter "f" should be doubled.
字母“f”应该双写。
Figure 3: Performance TAB shows you a letter grade (a, b, c, d, f) and a percent grade (1-100).
图3：性能标签使用字母(A,B,C,D,F)表示等级以及当前等级(1- 100)。
The letter was signed, Theodore F. Stoddard, MD.
但是，如今，他的名字变得长一些了——信上的署名是，医学博士斯托达德。
The task was simple — press the letter E or F on the keyboard when they appeared on the screen, replacing one of the two photographs shown on the screen.
这项任务非常简单——当屏幕上出现的两张照片，按下键盘上的“E”或“F”取代其中的一张。
A colon (:) after an option letter indicates that the option requires a value; for example, a -f option might be used to indicate a file name, as in the tar command.
选项字母后的冒号(：)表示该选项需要一个值；例如，- f选项可能用于表示文件名，tar命令中就是如此。
To turn an option on, prefix the corresponding option letter with a minus sign (for example, -f).
要开启选项，则需要在相应的选项字符前加上减号（例如，-f）。
But now his name was a little longer-the letter was signed, Theodore F. Stoddard, MD.
不过，这次他的署名长了一点，信的落款是：西奥多·f·斯托达德医学博士。
To apply for repetitious valid F visa needs to provide a letter or telegram from the senior authorized organizations.
申请二次入境有效F（包括团体）签证须提供一类或者二类授权单位邀请函电；
MIT takes plagiarism seriously: Plagiarism in this class will result in an automatic F and a letter in your file;
麻省理工学院将剽窃看得非常严重：在这个课程中如果你剽窃会自动得到F等级，而且会记录进你的档案中；
MIT takes plagiarism seriously: Plagiarism in this class will result in an automatic F and a letter in your file;
麻省理工学院将剽窃看得非常严重：在这个课程中如果你剽窃会自动得到F等级，而且会记录进你的档案中；
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