this; these; (commonly pronounced zhei4 before a classifier, esp. in Beijing)[cedict]
回
huíㄏㄨㄟˊ
to circle; to go back; to turn around; to answer; to return; to revolve; Hui religious minority (Chinese Muslims); time; classifier for acts of a play; section or chapter (of a classic book)[cedict]
对
duìㄉㄨㄟˋ
couple; pair; to be opposite; to oppose; to face; for; to; correct (answer); to answer; to reply; to direct (towards sth); right[cedict]