他们到第二年春天才住进了新家。
They were not able to take up residence in their new home until the spring.
它们会飞往南美几个特定的地方，然后在第二年春天又飞回到北美院子里的同一棵树上。
They fly to very specific places in South America and will often come back to the same trees in North American yards the following spring.
第二年春天，老两口又去了云南。
The following spring, the couple was once again on their way to Yunnan province.
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