源于珠江的湖泊容积下降了四分之一。
The lake at the source of the Pearl is down to less than a quarter of its normal volume.
实际流量除以理论流量得出一个数值，以百分比计，表示的即是容积效率。
Dividing the actual flow by the theoretical value calculated above will yield a value which, taken as a percent, indicates volumetric efficiency.
当已经进入这个早期阶段，像轴距、行李舱容积，引擎，内部宽度和安全规定等关键部件是设计指示中固定的一部分。
Already at this early stage, key components such as the wheelbase, luggage compartment volume, range of engines, interior width and safety stipulations are fixed as part of the design brief.
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