Don't be wishy-washy. define explicit function arguments.
不要不正式。定义显式的函数参数。
Explicit function calls are required in order to create and destroy object instances.
显式要求创建和摧毁一个对象的实例。
There should be an explicit function called Create a copy. The copy will be identical to the original, but not tied to the original in any way.
叫做“创建副本”的功能,副本应该和原始文档一模一样,但不应该与原始复制捆绑在一起。
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