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]
你
nǐㄋㄧˇ
you[cedict]
开心
kāi xīnㄎㄞ ㄒㄧㄣ
to feel happy; to rejoice; to have a great time; to make fun of sb[cedict]