他们都遵守着那条约束他们所有人的默认规则——要守口如瓶。They obey the one unwritten rule that binds them all—no talking.这条规定赋予了总统绝对及不受约束的权力。This provision gives the president total and unchecked power.自己在家锻炼需要很强的自我约束能力。Exercising at home alone requ...
给服务员、行李搬运工、导游和司机小费是惯例。It is usual to tip waiters, porters, guides and drivers.她给了吧台服务员10美元小费，还请在场的所有人喝了酒。She tipped the barmen 10 dollars and bought drinks all round.加收了10%的服务费以代替小费。A 10 percent service charge is added i...