增益集的主检视为抽象基底类别或介面，会描述主机和增益集使用的方法，如合约中所指定。
The host view of the add-in is the abstract base class or interface that describes the methods used by the host and the add-in, as specified in the contract.
增益集的主检视为抽象基底类别或介面，会描述主机和增益集使用的方法，如合约中所指定。
The host view of the add-in is the abstract base class or interface that describes the methods used by the host and the add-in, as specified in the contract.
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