the central nervous system is another name for the brain
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teachers are to rough on students it's so sad some people starve themselves because they have to much work to do
Vaccines, generally, cost less than actually treating the disease when you have it. So, I'd go with the 2nd option.
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Remember that people are going through their own worries, and we all could always use a friend. Even if you think everyone has their own clicks, people want to meet someone new. Introduce yourself and what your interests are like hobbies and interests.
Most importantly, don't let anyone be mean to you, show them you have respect and believe you deserve that back. I understand how you feel, I wished someone would've told me when I moved and had no friends that I wasn't alone in that. If you search with good intention and respect of yourself, good friends will come your way.
Cheers!