to grasp (often fig.); to control; to seize (initiative, opportunity, destiny); to master; to know well; to understand sth well and know how to use it; fluency

to control; in control of

applause; CL:陣|阵[zhen4]

in charge of; to control

to wield (political etc) power; be in power

to applaud; to clap

palm

to know sth like the back of one's hand (idiom); to know (a person, a place etc) inside out

to clap one's hands; to clap each other's hands; high five

cactus