必不可少: absolutely necessary, indispensable, essential...
天使: angel...
推开: to push open (a gate etc), to push away, to reject, to decline...
广义: broad sense, general sense...
排放: emission, discharge, exhaust (gas etc)...
同胞: born of the same parents, sibling, fellow citizen, compatriot...
奔波: to rush about, to be constantly on the move...
甜头: sweet taste (of power, success etc), benefit...
