The -f operator returns true only if the file exists.
只有在文件存在时，-f操作符才返回true。
The sound emerges from the f-holes, a pair of elegantly curled slits either side of the bridge.
声音从f孔传出，两个卷曲精致的f孔位于琴码两侧。
The F-35B is the first aircraft to combine stealth with short takeoff/vertical landing (STOVL) capability and supersonic speed.
F-35B战斗机是第一架结合隐形和短距/垂直起降（STOVL）能力的超音速战斗机。
For example, you can create a worker to list the contents of a directory. The -f argument names the function the worker is providing.
例如，可以创建一个worker来列出某个目录的内容。
The c option tells tar to create a new archive, and the f option to use the next argument as the name of the archive file to be created (mydir.tar).
c选项让tar创建新的存档文件，f 选项使用后面的参数指定要创建的存档文件的名称 (mydir.tar)。
Schwartz did not mention progress on the Navy's version of the jet, the F-35C or the Marine Corps' F-35B short takeoff and vertical landing version of the fighter.
洛克希德官员称，施瓦茨并未提及海军版本的喷气机、F-35C或海军陆战队的F-35B垂直起降战斗机版本的进展。
Officially, the F-117 was obsolete.
从官方来说，F- 117已经过时。
May I just press the F and TWO at the same time?
F和2同时按吗？
All three squadrons were flying the F-84F Thunderstreak.
三个中队都在驾驶F-84F 雷击战机。
It is fully integrated into the F-22 \ 's electronic suite.
它完全被集成到F - 22的电子系统中。
They completed their first deployment with the F/A-18E Super Hornet.
他们完成了F/A-18 战斗攻击机“超级大黄蜂”的首次部署。
The F-35 is a supersonic, multi-role, 5th generation stealth fighter.
这架F - 35是一种超音速，多用途，第五代隐形战斗机。
This will result in lower costs for the F-35B Lightning II Programme.
这将降低F - 35 B“闪电ii”项目成本。
Even if Mr Burbage is too sanguine, the F-35 is in no imminent danger.
即使博比奇过于乐观，F - 35也并没有迫在眉睫的危险。
That same year, the F. D. A. finally responded to Dr. Jacobson's petition.
同一年，食品和药物管理局最终对雅各布森博士的请求作出回应。
To achieve selective normalization, use the F&O function normalize-unicode().
要实现选择性规范化，可使用F&O函数normalize-unicode()。
With the air force and navy versions of the F-35, the debate is more nuanced.
关于空军和海军版的F - 35，辩论更加微妙。
Mr Burbage says that a programme as big as the F-35 is bound to attract barbs.
博比奇表示，像F - 35这样大的项目势必引来闲言碎语。
We start with the F-22 Raptor, the newest fighter in the US Air Force arsenal.
我们先从美国空军武器库中最新型的战斗机——F – 22“猛禽”开始。
In the case of the F-35, then, this sort of electromagnetic artillery is mainly defensive.
以F - 35为例，这种类型的电磁炮主要用于防御。
The F. D. A. announced in 2007 that it was aware of that problem, but it has taken no action.
食品和药物管理局在2007年宣布它认识到了那个问题，但它没有采取行动。
The F-16 fighters will replace the Chile's aging F-5 jets, which have been in use since 1976.
这些F - 16战机将替代智利从1976年就开始使用早已老化的F - 5喷气式飞机。
the F# libraries (usual stuff, ranging from immutable lists to asynchronous computations library)
F#函数库（囊括从不可变列表到异步计算函数库的一些常用的东西）
Pamiljans also has worked as a program manager on the F/A-18 and F-35 strike fighter programs. Capt.
据悉，Pamiljans还担任过F/A-18和F-35战斗机项目的经理。
The Pentagon guesses that it will cost a third more to run the F-35 than the aircraft it is replacing.
五角大楼猜测，使用F-35要比使用那些被其取代的飞机多出三分之一的开销。
This advanced system meets evolving customer requirements and is Raytheon's latest offering for the F-16.
该先进电子战系统满足用户不断提高的作战需求，是雷声公司为F-16提供的最新装备。
This advanced system meets evolving customer requirements and is Raytheon's latest offering for the F-16.
该先进电子战系统满足用户不断提高的作战需求，是雷声公司为F-16提供的最新装备。
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