怀疑doubt（后跟之词是否定的）;suspect（后跟之事是真的）;be skeptical(or sceptical);suspicion;skepticism
我们不～你方的诚意。We have no doubts about your sincere desire(or good faith)./我们～他们这样做是别有用心的。We suspect that they have ulterior motives in doing so./他们对这种制度究竟能否奏效表示～。They express doubts that the system can work effectively./表示～cast doubts on sb or sth/持～态度take a skeptical attitude /毫不～ no doubt;undoubtedly;beyond doubt; without a shadow of doubt/令人～的幸事a doubtful blessing /消除～dispel doubts; clear up suspicion/引起～ raise doubts; arouse suspicion /对其言论的真实性有～doubt the truth of sb's statement |