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。

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Depending on your computer, it could be marked as an (e:), (F:), (J:), or (d:) drive.

根据您的电脑，移动硬盘可能被识别为E盘(E：)、F盘(F：)、J盘(J：)或者D盘(D：)。

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Phase difference between the e. m. f. of an alternator taken as a reference and that of another alternator or that of an infinite bus.

作为参考的交流电机电动势与另一台交流电机或无限大母线电动势之间的相角差。

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Microsoft ( MSFT) has traded in a fairly tight range since early August, and the weekly charts show a triangle, or flag formation, lines e and f.

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