this; these; (commonly pronounced zhei4 before a classifier, esp. in Beijing)[cedict]
是
shìㄕˋ
is; are; am; yes; to be[cedict]
怎么
zěn meㄗㄣˇ ㄇㄜ˙
how?; what?; why?[cedict]
一
yīㄧ
one; 1; single; a (article); as soon as; entire; whole; all; throughout[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]