Big dog barks loudly at mailman.
Meaning: A large dog makes a very noisy sound, directed towards the mailman.
Choice of Words: Big means large in size. Dog is a type of animal that is often kept as a pet. Barks means to make a loud noise, typically by a dog. Loudly means in a very noisy manner. At indicates the direction or target of the barking. Mailman is a person who delivers mail.
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