曲折: winding, complicated...
弟弟: younger brother...
冗长: long and tedious, redundant, superfluous, supernumerary, verbose (of writing)...
向上: upward, up, to advance, to try to improve oneself, to make progress...
爱人: spouse (PRC), lover (non-PRC)...
一毛不拔: stingy (idiom)...
人行道: sidewalk...
先生: teacher, husband, doctor (dialect), Mister (Mr.)...
两边: either side, both sides...
志愿者: volunteer...