to be your best at the main thing什么意思

to be your best at the main thing！
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有没有更确切的，能确定是什么意思吗？
一个女生给我写的

to be your best at the main thing什么意思 It must be very interesting in your way to the best,which is far away from you forever.中文翻译 be bad to your health I am will be your best friend !这句通么？ I only want to be your friend help me to translate them, try your best.. Thank you. Send my best----------(greeting / greetings) to all your family. To be the best one in my mind what would be the best food to eat in summer? She is considered to be the best singer__Australia