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

Listing 21 shows tee being used to save output in two files, f1 and f2.

清单21显示用于将输出保存到文件f1和f2中的tee。

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