The varieties of organic manures tended to be readily available, 57% in open field and 77% in protected field were chicken manure.
有机肥品种，趋于速效性，鸡粪投入量大，在露地占57％，保护地占77％。
参考来源 - 北京市无公害蔬菜诊断施肥与环境效应研究·2,447,543篇论文数据，部分数据来源于NoteExpress
In this example, properties are used to access a protected field.
这个范例使用属性来存取受保护的栏位。
For example, to add a protected field of type Publisher to the ElectronicMedia class.
例如，添加一个类型Publisher的protecte d域到electronicmedia类。
I changed the reuse mechanism from protected field via inheritance to method parameters.
我将重用机制从protected field via inheritance更改为method parameters。
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