Definitions

[1] adj. 可疑的, 疑心的, 不明确的

[2] [法] 怀疑的, 有疑问的, 未确的

[ 'dautful ]

1. Mrs. Harris is very doubtful about her son's future.
   夏里斯太太對她兒子的前途沒有甚麼信心。
2. It's the answer that led those who've been told for so long, by so many, to be cynical and fearful and doubtful about what we can achieve, to put their hands on the arc of history and bend it once more toward the hope of a better day.
   就是這個答案，讓那些長久以來被灌輸要嘲諷、害怕和懷疑自身能力的人們 把他們的手放在歷史的弧線上，將它彎向一個更美好的一天的希望。
3. I'm doubtful that he's going to come.
   我怀疑他是否会来。
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