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。

youdao

There are also photographs and detailed diagrams of supposed alien spaceships that some U. F. O. spotters helpfully included with their letters.

这里还有图片和详细的图表关于外星人的飞船，甚至还有他们给我们的信。

youdao

service supports a second parameter — u — that accepts either f for Fahrenheit or c for Celsius.

服务还支持第二参数 — u —，该参数既接受华氏温度（Fahrenheit）符号 f，又接受摄氏温度（Celsius）符号 c。

youdao

The F-35 will be used by the U.S.Air Force and also by the Navy to fly off of aircraft carriers.

VOA: standard.2009.07.21

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

That same year, then President John F.Kennedy vowed in a speech before the U.S.Congress to put a man on the moon.

VOA: standard.2009.07.16

Another finding from this initial poll had clear strategic implications: the economy concerned the U.F.

NEWYORKER: Battle Plans

By then, he had succumbed to paranoid delusions that the world was under attack by U.F.

NEWYORKER: Novelty Acts

That is why we get a plague of U.F.

NEWYORKER: Cowboys & Aliens