First you make the shape for the letter "f", then the shape for the letter "u", and then the shape for the letter "n".

你首先要做出字母“f”的形状，之后是字母“u”的形状，然后是字母“n”的形状。

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Syscat.tabconst Contains a row for each unique (u), primary key (p), foreign key (f), or table check (k) constraint db2 select constname, tabname, type from syscat.tabconst.

tabconst为每个唯一性(U)、主键(p)、外键(f)或者表检查(K)约束保持一个行db2 select constname, tabname, type from syscat . tabconst。

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Elbit Systems is now developing its Canary device for U. S. F-35 fighter jets and other aircraft.

埃尔比特系统有限公司目前正在为美国F - 35战斗机和其它机型开发“金丝雀”设备。

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and the same for favour, they spell f-a-v-o-r, we put u in it,

同样地，对于发烧这个单词，他们拼写成f-a-v-o-r，我们要加一个u在里面，

美式英语和英式英语 - SpeakingMax英语口语达人

At altitude, its top speed is Mach 2.25 compared to Mach 2 for the U.S. F-16 Fighting Falcon, another multirole fighter aircraft made by General Dynamics and Lockheed Martin.

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Few things illustrate this more clearly than the J-11B, a Chinese fighter that Russian officials allege is a direct copy of the Su-27, a one-seat fighter that was developed by the Soviets through the 1970s and 1980s as a match for the U.S. F-15 and F-16.

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