Look at the nurse. There are two injectors in the paper box. She is holding an injector in her left hand. She is pressing the injector, so the liquid is dropping from the needle of the injector. She is wearing a pink uniform of a nurse.
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I have described a nurse in a hospital.
Would you like looking at the sentences above? And let me know whether the expressions are correct or not.
The more commonly used word for "injector" is "syringe."
In the last sentence, I'd use "the" rather than "a" in front of "pink."
=)