1、He is known to be untrustworthy, so I never rely on what he says.
他以不值得信任而闻名，所以我从不依赖他说的话。
2、The untrustworthy salesman promised me a great deal, but it turned out to be a scam.
那个不可靠的销售员向我承诺了一个很好的交易，但事实证明那只是个骗局。