In youth, say up to the age of seventy or eighty years, no other tree forms so strictly tapered a cone from top to bottom.

在青年时代，比如说七八十岁之前，没有其他树木从上到下严格地呈圆锥形。

In its youth up to the age of seventy or eighty years, none of its companions forms so strictly tapered a cone from top to bottom.

在它七十岁或八十岁之前的年轻时期， 它的同伴中没有一个从上到下形成如此严格的锥形。