While most conventional airborne radars rely on some form of mechanically scanned antenna to transmit and receive signals, active electronically scanned array (AESA) sensors employ a fixed aperture.
当多数常规机载雷达依靠机械扫描天线收发信号的时候，有源电子扫描阵列(AESA)传感器却使用固定的孔径。
Apple has supposedly fixed the antenna issue that emerged immediately following the release of the iPhone 4. Does this mean we won't be receiving a free case this year?
Apple似乎认为他们解决了iPhone4上市后马上出现的天线问题，这是否意味着我们今年就不能得到一份免费的大礼了？
Apple has a full year until they release another iPhone (unless they release an antenna-fixed iPhone 4.1) if they stick to their yearly summer launch schedule.
如果他们依照自己每年夏季推出新产品的时间表才发布新产品，那么苹果公司还有整整一年的时间才能推出新一款iPhone产品，除非他们年内发布一款带有固定天线的iPhone4.1。
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