dubious [5du:bIEs] adj. 可疑的;不确定的(inclined to doubt ;questionable)
(类)disaffected·contentment=dubious·commitment 不满的·满足=可疑的·确信
(反)dubious ◆ certain 不确定的 ◆ 确定的
indubitable ◆ questionable 不容置疑的 ◆ 值得怀疑的
(同)doubtful, dubitable, equivocal, problematic, suspect, uncertain, unclear, undecided
ductile [dQk5til] n.有延展性的(capable of being drawn out or hammered thin)
(类)ductility·malleable=toxicity·poisonous 延展性·延展性的=毒性·有毒的(同义)
(同)plastic, adaptable, malleable, moldable, pliable, pliant, supple
dulcet [`dQlsIt] adj.(声音)悦耳的(pleasing to the ear; melodious)
(反)dulcet ◆ cacophonous 悦耳的 ◆ 刺耳的
(同)euphonic, euphonious, mellisonant, melodic, sweet, tuneful