definite; certain; fixed; to fix (on sth); to determine; to be sure; to ensure; to make certain; to ascertain; to clinch; to recognize; to confirm; OK (on computer dialog box)[cedict]
是
shìㄕˋ
is; are; am; yes; to be[cedict]
有人
yǒu rénㄧㄡˇ ㄖㄣˊ
someone; people; anyone; there is someone there; occupied (as in restroom)[cedict]