...不屈不挠 Although he has failed several times, he still keeps his chin up. (as steady as a rock; firm and unyielding; fight for tooth and nail; hang on by the eyelashes; stick to one's color) 不知死活 John is really heedless of consequences.
2
?硬着头皮干下去
... hang one on 猛击某人一拳,给某人... hang on by the eyelashes硬着头皮干下去,百折... hang on the skirts of 依赖 ...