狠心: callous, heartless...
光明: light, radiance, bright (prospects etc), openhearted...
态度: manner, bearing, attitude, approach...
隧道: tunnel...
紫: purple, violet...
郑重: serious, solemn, earnest, conscientious...
立方米: cubic meter (unit of volume)...
帮手: helper, assistant...
坚强: staunch, strong...
麻木: numb, insensitive, apathetic...