The first-aider will be ready with a first aid kit and will be on guard in case of accidents or injuries. First aid means, the first action done on someone who is injured or not feeling well within the designated place. He/she must know some first aid treatments or methods, such as treating a cut or bruise, giving artificial ventilation and CPR, etc.
Concede. A verb. To admit that something is true after denying it.
Thats cool i guess, whatever
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I suggest listing the digital sources you're asking about so people know what exactly you're referring to and can help you easier with this.
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yes it's very true because it makes it easier for the presenters to pass their valid points on a certain topic being argued on