When you start a V-8 engine, you are only driving two cylinders (1 liter) through their compression strokes, but with one big cylinder you would have to compress 4 liters instead.
Google's prototype self-driving cars cruised a continuous 1, 000 miles of winding highways and city streets without a single intervention from their human drivers.
Google的无人驾驶原型汽车在无人干预的情况下已经行驶了1000英里的高速公路和城市街道。
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July 1, 2008, is the 150th anniversary of the first announcement of his discovery of natural selection, the main driving force of evolution. Since 2009 is the 200th anniversary of Darwin's birth Feb.