A scramjet is a type of jet engine that USES compressed air in place of conventional turbines to create thrust. Read "U." S. Developing Jets that Fly Five Times the Speed of Sound.

超音速燃烧冲压喷气发动机是利用压缩空气替代常用的涡轮，形成推力的一种喷气发动机。

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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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To unmount a FUSE file system, you can type fusermount -u /some/mount/point.

可以输入 fusermount -u /some/mount/point 以卸载 FUSE 文件系统。

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The government has said it is confident there will not be a second U-turn on the type of fighter planes to be used on the navy's new aircraft carrier.

BBC: Joint Strike Fighter planes (file pic)

The airline launched nonstop U.S. flights offering both business-class and a premium-type coach cabin.

WSJ: The World's Longest Flight, in Coach

Is the U.S. encouraging Kofi Annan to host sort of a conference-type, where there would be a transition of power like they did in Yemen and President Saleh got immunity?

WHITEHOUSE: Press Briefing