tā / yī / xiàng / shǒu / kǒu / rú / píng / cóng / bù / xiàng / bié / rén / tòu / lù / kè / hù / de / yǐn / sī

他一向守口如瓶，从不向别人透露客户的隐私。

He has always been tight-lipped and never reveals his clients' privacy to others.