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]
是否
shì fǒuㄕˋ ㄈㄡˇ
whether (or not); if; is or isn't[cedict]
完全
wán quánㄨㄢˊ ㄑㄩㄢˊ
complete; whole; totally; entirely[cedict]
理解
lǐ jiěㄌㄧˇ ㄐㄧㄝˇ
to comprehend; understanding; comprehension; to understand[cedict]