n. directs the work of others
n. an original creation (i.e., an audio recording) from which copies can be made
n. an officer who is licensed to command a merchant ship
n. someone who holds a master's degree from academic institution
n. 主人, 硕士, 大师, 母机
a. 主人的, 主要的
vt. 征服, 控制, 精通