词汇	covariant vector field
释义	covariant vector field 共变向量场
随便看	I am admittedly afraid I am a doctor I am a dollar short I am a doubly privileged visitor I am a driver I am a dying God I am a dying God,coming into human flesh I am a dying God, coming into human flesh I am a farmer I am a federal employee I am affable to everyone I am a fighter I am a fighter,not a qu IT ter I am a film fan I am a film goer I am a football fan I am a football player i am afraid I am afraid I am afraid divorce is thr only choice I am afraid he is too lean to endure it I am afraid he is too thin to be burden with it I am afraid I am come down with a cold I am afraid I can not be certain about that I am afraid I can not care less about the news