Since batteries can be recharged only slowly (the process takes hours, not minutes), a car's effective range is limited by the size of its battery. And batteries are expensive.

由于电池充电缓慢(这一过程耗时数小时，而不是几分钟)，因此汽车的有效行驶里程取决于电池的容量，而电池是很昂贵的。

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The size of ultrasonic container should be selected according to sound field effective range.

在超声试验中应根据声场的有效范围选择使用容器的大小。

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The effective range of P-wave, S-wave, R-wave could be analyzed from the contours of dynamic stress.

从动应力等值线图上也可分析出强夯作用时压缩波、剪切波、瑞利波的作用范围。

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He argues that compared with, say, South Korea, Brazil went into recession equipped with an effective range of anti-poverty schemes.

ECONOMIST: Defeats and victories in Brazil’s war on poverty | The

The signal transmitted by Bluetooth is fairly low-powered, which means the effective range of any device is limited to about 10 metres.

BBC: NEWS | Programmes | Click | Click Essentials: Bluetooth

Britain has also helped with air-to-air refuelling, thus extending the effective range of America's carrier-based bombers, and agreed to the use of Diego Garcia, a British island in the Indian Ocean, as a base for heavy bombers.

ECONOMIST: The war in Afghanistan