如果你有台电脑，并对灰熊感兴趣，那么上时间树网站试试吧，网址是timetree.org。
If you have a computer and are just curious about the grizzly bear, go to timetree.org.
作用于树高生长的灰因子集随年龄增长而加强。
The Gray Factor set affecting the height growth was strengthened as the age increases.
作用于树高生长的灰因子集随年龄增长而加强。
The Gray Factor set affecting the height growth was strengthened as the age increases.
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