以下为句子列表：
英文: An antenna array that is truly smart would be able to aim a radio beam directly at a mobile user instead of choosing a beam that comes relatively close.
中文: 一个真正聪明的阵列天线，必须能够直接把波束瞄准行动用户，而不是选用与用户较为接近的波束。
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英文: And when the array transmits back to the cell-phone user, the processor sends an out-of-phase signal to one of the antennas, generating a radio beam that runs from north to south.
中文: 当阵列发射讯号给行动电话用户时，处理器会传送一个异相的讯号到其中一个天线，产生由北往南的无线电波束。
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英文: Because the processor is fast enough to perform this task many times a second, the array can continually readjust the radio beam as the cell-phone user walks or drives across the array's coverage area.
中文: 因为处理器的速度很快，可在一秒内执行多次工作，所以当行动电话用户在阵列涵盖範围内行走或开车时，阵列可不断重新调整无线电波束。
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英文: Notice that in both these examples the radio beam generated for one cell-phone user does not reach the other.
中文: 注意，在上述两例中，针对其中一名用户产生的无线电波束，并不会抵达另一位用户的所在位置。
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