youdao

F2 renames a file or folder.

F2用来重命名文件或者文件夹。

youdao

For example, to assign F2 to the command, press the F2 key.

例如，要把f2键分配给命令，请按f2键。

youdao

That is nonpolar. And likewise for fluorine, F2.

他就是非极性的，同样，氟气也是的。

麻省理工公开课 - 固态化学导论课程节选

Right. I don't want to give it too many different names, because F2, 3 and F3, 2 are equal and opposite.

没错,我不想用太多不同的名字,因为 F23 和 F32 大小相同方向相反

耶鲁公开课 - 基础物理课程节选

Let's point it that way and call it F2 on 3.

它指向这个方向,名叫 F23

耶鲁公开课 - 基础物理课程节选

"IU135F3-Z" is the auto focus imaging module that employs a high-resolution lens bright F2.2.

ENGADGET: Sony announces new Exmor RS cameraphone sensor: upgraded signal processing, HDR video recording

These include Panasonic's new LUMIX G X VARIO 12-35mm lens, offering F2.8 brightness throughout its entire zoom range.

ENGADGET: Panasonic's Lumix lineup grows: DMC-G5 Micro Four Thirds, DMC-FZ200 superzoom and DMC-LX7 hands-on and sample shots

At F2.8-4 wide open, this fast lens is perfect for low-light photography or scenes beckoning a beautiful bokeh effect.

ENGADGET: Fujifilm grows X-series mirrorless lineup with 16.3-megapixel X-E1