在翼型或机翼的风洞试验中，常用绊线或局部表面粗糙度来固定边界层转捩。

In wind tunnel test, tripping wires or a local surface roughness are often applied to fixing the boundary layer transition on airfoils or wings.

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环境中有许多其他因素会影响性能，包括网络使用率、服务器上的其他程序、拒绝服务攻击以及电源线被绊断。

Many other factors in the environment can affect performance, including network utilization, other programs on the server, denial of service attacks, and tripping over the power cord.

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这人穿着深绿色的线绒衣，带着脚绊……老式的样子，红润的脸孔，红的髭须，和冷淡的眼睛。他正迅速地向山下走去。

He was a man in dark green velveteens and gaiters... the old style, with a red face and red moustache and distant eyes. He was going quickly downhill.

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