http://www.matthewjeffery.com/permanent_residence.html
These cards can be renewed continuously provided the permanent resident has met the residency requirement. In this regard, it is a requirement of Canadian immigration law that permanent residents physically reside in Canada for at least 2 years out of every 5 in order to maintain their permanent residence. Therefore, a Canadian permanent resident can spend up to 3 years out of every 5 absent from Canada and still maintain their residence. How this 3 years is divided up within the 5 year period is irrelevant, as long as
the permanent resident lives in Canada for at least 2 years within the 5 year validity of the card. However, if a permanent resident remains outside Canada for more than 3 years in a 5 year period, they risk losing their permanent residence
今天在这个网站上面看到这段话，好像写的只要在卡的5年有效期内住满2年。这是不是可以理解为renew枫叶卡后，就按照新卡的5年期开始算了。
英语不是很好，看的时候总是不敢确定，害我过去三年一直以为是任意一个5年期，今天别人告诉我不是，发给我这个网址和这段话。。。
