虽然他在离开英国前和父母有过争吵，但当他返回家中时仍然极受欢迎。
Although he had argued with his parents before he left England, when he returned home he was as welcome as the flowers in May.
中断服务子程序内容：灯全部熄灭，2 秒钟后发光二极管全部点亮，再过 1 秒钟后中断返回。
The contents of the interrupt service routine: all the lights off, 2 seconds later all the light-emitting diode, another 1 second to return after the break.
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