to speak; to say; a theory (usually in compounds such as 日心说 heliocentric theory)[cedict]
肯定
kěn dìngㄎㄣˇ ㄉㄧㄥˋ
to be sure; to be certain; sure; certain; definite; to confirm; to affirm; affirmative[cedict]
成功
chéng gōngㄔㄥˊ ㄍㄨㄥ
success; to succeed[cedict]
你
nǐㄋㄧˇ
you[cedict]
只管
zhǐ guǎnㄓˇ ㄍㄨㄢˇ
solely engrossed in one thing; just (one thing, no need to worry about the rest); simply; by all means; please feel free; do not hesitate (to ask for sth)[cedict]
相信
xiāng xìnㄒㄧㄤ ㄒㄧㄣˋ
be convinced (that something is true); believe; to accept sth as true[cedict]