doubtful的精选

doubtful可疑的常见释义英[ˈdaʊtfl]美[ˈdaʊtfl]adj.可疑的怀疑拿不定主意不确定未必难说不大可能不明朗悬而未定可能变糟低劣的例句Intrulydoubtfulcases，onlytestcrosseswillrevealtheactualgenotype.puzzled困惑...