on top of things perfect oneself in completely master fully master have complete control of show perfect mastery of completely grasp fully understand know sth inside out know sth off pat
on top of things
perfect oneself in
fully understand
完全接受用英文怎么说
完全控制用英文怎么说
完全支持用英文怎么说
完全改变用英文怎么说
完全放心用英文怎么说
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