There are significant differences in growth in the young tree stage among different provenances of Sea Buckthorn and the differences are obvious with different geographic population variation.

试验表明，沙棘不同种源的营养生长和生殖生长以及果实生化成分都存在明显的差异。

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The parsing stage creates arbitrary tree structures on the basis of token lists.

解析阶段在记号列表的基础上创建任意的树结构。

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The parsing stage might be considered the most complicated, as it requires a somewhat recursive design to parse the XML tree.

解析阶段可能是最复杂的，因为它需要一定程度的递归设计来解析xml树。

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Elsewhere in the world, regions take 30 to 50 years to recover from bush fires, but here they are the first stage of new life, with tree fronds forming within a couple of weeks.

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Pine, the most commonly farmed tree in the U.S., reaches pulp stage in 10 to 14 years, is ready for saw mills near age 20, and by age 25 to 27 is fully mature and usable for framing lumber, plywood and telephone poles.

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