... classes of extinguisher 灭火器的类型 classes of fire 火灾的类型 classes of forest fire 森林火灾的等级<表示森林火灾大小或范围的分类法 ...
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classes of forest fire 森林火灾的等级
Swing components that are the targets of user interaction fire events when the user interacts with them; data model classes fire events when the data has changed.
Swing 组件作为用户交互的目标，在用户与它们交互的时候触发事件；数据模型类在数据发生变化时触发事件。
First of all, I think school should open some classes for escaping from fire, teaching students some main principles in that situation.
首先，我认为学校应该开设火灾逃亡的课程，教学生一些遇到火灾时的重要注意事项。
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