鸟类也有天生的时间感应器指导它们秋春迁移。
Birds also have built-in timepieces which send them off on fall and spring migrations.
Ajax请求天生是异步的，所以这个检查可以处理服务器响应未按次序到达的情况。
Ajax requests are inherently asynchronous, so this check safeguards against server responses that arrive out of sequence.
Haile估计，安装在屋顶的一个反应器可以每天生产大概3加仑的燃料。
Haile estimates that a rooftop reactor could produce about three gallons of fuel a day.
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