The systems are getting smaller and using lower voltages.这些系统变得更小，使用的电压也更低。The exact voltages used depend on the local supply.具体电压要视地区供电情况而定.Precision shunts are used to convert currents to voltages for the amps function...

The storms could increase the risks posed by river blockages.暴风雨会增加因河道堵塞所造成的危险.An angiogram shows the location and severity of blockages in blood vessels.冠状动脉造影能够显示血管内的阻塞位置以及阻塞的严重程度.Blockages can calls head tax cause hea...

n.车库（ garage的名词复数 ），汽车修理站，加油站，（兼营汽车修理、销售的）加油站...

n.使用( usage的名词复数 )，用法，习惯，惯例...