小费: tip, gratuity...
一线: front line...
担任: to hold a governmental office or post, to assume office of, to take charge of, to serve as...
学者: scholar...
金属: metal...
后者: the latter...
招揽: to attract (customers), to drum up (trade)...
招牌: signboard, shop sign, reputation of a business...
间隙: interval, gap, clearance...
拜见: to pay a formal visit, to call to pay respects, to meet one's senior or superior...
