肇事: to cause an accident, to be responsible for an incident, to provoke a disturbance...
礼物: gift, present...
摩托: motor (loanword), motorbike...
形成: to form, to take shape...
环境: environment, circumstances, surroundings, ambient...
属于: to be classified as, to belong to, to be part of...
小心翼翼: cautious and solemn (idiom); very carefully, prudent, gently and cautiously...
把握: to grasp (also fig.), to seize, to hold, assurance, certainty, sure (of the outcome)...
何苦: why bother， is it worth the trouble?...
语法: grammar...
