(noun.) an original creation (i.e., an audio recording) from which copies can be made.
(noun.) an authority qualified to teach apprentices.
(noun.) directs the work of others.
(noun.) someone who holds a master's degree from academic institution.
(noun.) an officer who is licensed to command a merchant ship.
(verb.) have a firm understanding or knowledge of; be on top of; 'Do you control these data?'.
(verb.) be or become completely proficient or skilled in; 'She mastered Japanese in less than two years'.
安布尔手打
弗洛整理