Unlike the better balanced straight-six or even the ultra-smooth V-12 engine, the humble four-cylinder generates an up and down vibration with a frequency of twice the crankshaft's rotational speed.

不像运行起来比它更稳定的直列六缸引擎或者极其流畅的V - 12引擎，卑微的四缸引擎会以一种比自身机轴转速高两倍的频率产生一上一下的振动。

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The experimental results of the V slope welding show that the system has highly response speed and control precision and the system can meet the requirements of the engineering application.

针对V型坡口的焊接试验证明，系统具有较高的响应速度和控制精度，完全能够满足实际工程的应用需要。

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From this we see that the resistance to further acceleration becomes infinite when v approaches c-hence cis the ultimate speed.

从这个公式中可以看出，当v接近于c时，更进一步加速所产生的阻力变得无限大-所以c是极限速度。

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If you want to find the speed there, you put the equation v^=v0^-2g.

如果你想求出那一点的速度,可利用方程v^=v0^-2g

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There's also a 3.5-liter, 270 horsepower V-6 with a transmission that gets upgraded from a five-speed automatic to six speeds.

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The EN-V runs on battery power and plugs into a wall -- giving it a max speed of about 30 miles per hour and a range of about 30 miles.

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The eight-speed is only available with V-6 engines.

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