But those that do are often relatively fast growers.

但那些这样做的树木往往生长速度相对较快。

They also tended to be fast growers, meaning that measuring their price against present earnings risked understating future profits.

而它们往往也发展迅速，这就导致，如果将它们的价格与目前的利润进行比较，可能会低估未来的利润。