此接口将在类与其所有使用者之间定义契约。
This interface defines the contract between the class and any of its clients.
所有使用者将义不容辞地与科学界广泛分享他们的研究成果。
All users must share their results with the broader scientific community.
interface的所有使用者都同意仅使用interface中指定的方法。
Any consumer of the interface agrees to use only the methods specified in the interface.
And all of this has to be learned through exposure to language users.
而且所有这些都必须通过,暴露于拥有语言使用者的环境才能习得
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