The detail data declared in the sub-classes is loaded only when a user either selects the tree leaf or opens the tree node.

在子类中声明的详细数据只在用户选择这个树叶或打开树节点时才会装载。

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Here, growth regularity of leaf tillers and population structure of winter wheat seeded on suitable time, and the four cultivation systems are introduced in detail.

本文较详细地介绍了适期播种的冬小麦叶蘖生长规律、群体结构及四大栽培体系的技术特点。

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