实验性
表示效果（例如中毒）的添加到实体前相关的更改信息。
Contains information related to changes to an effect - like poison - being added to an entity.
若为 true，则表示将取消该事件。
true
When set to true will cancel the event.
效果持续时间。
Effect duration.
只读
正在添加的效果类型。
The type of the effect that is being added.
正在添加效果的实体。
Entity that the effect is being added to.
表示效果（例如中毒）的添加到实体前相关的更改信息。
Contains information related to changes to an effect - like poison - being added to an entity.