邓宁女士记不起买这辆帕卡德车花了多少钱，也不清楚这辆直列8缸发动机的车跑了多少里程。
Ms. Dunning cannot recall how much she paid for the Packard, and said it was unclear how many miles were on its in-line 8-cylinder engine.
在19世纪70年代前所制造的直列四缸引擎中三菱引擎就是第一个推广平衡轴的使用的。
Mitsubishi Motors was one of the first to popularise the use of balance shafts in straight-four engines built from the 1970s onwards.
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。
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.
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