to be very familiar with something; to have a thorough understanding of something
对某事非常熟悉；对某事有透彻理解 (dui mou shi feichang shuxi; dui mou shi you touche lijie)
"He really knows the ropes in this field of work."
"他在这个工作领域真的非常熟悉" (ta zai zhege gongzuo lingyu zhen de feichang shuxi)
to stop paying attention and mentally drift away
to submit something to someone in authority
to achieve a small success but fail in the larger goal
to be so surprised that you doubt what you see
to abandon someone to face blame or trouble alone.
an informal way to say thank you very much
