精通be learned in;be well grounded in;ill seen;made herself master of;make ourselves master of;proficiency详细»
精通am at home in;are at home in;get the mastery of;is at home in;made himself master of;master ship;was at home in;were at home in详细»
精通am at home in;are at home in;proficiency;was at home in;were at home in详细»