doubtful
['dautfəl]
adj.可疑的, 怀疑的, 不确定的
例句与用法：
The ethics of his decision are doubtful.
他的这一决定是否合乎道德规范值得怀疑。
It is doubtful whether he can read my fortune or not.
他能否算出我的运气还是个疑问。
I am doubtful about the propriety of granting such a request.
我怀疑答应这项要求是否合适。
A doubtful claim; doubtful prospects.
令人怀疑的索赔案; 令人可疑的前景
Because of a long drought, the farmers are doubtful about the prospect of a good yield.
因为长时间的干旱，农民们对于好收成的前景是怀疑的。
词形变化：
副词: doubtfully | 名词: doubt-fulness |
详细释义：
a.
1. 怀疑的, 疑惑的[F][(+about/of)][+wh-]
I'm doubtful whether she's still alive.
我怀疑她是否还健在。
2. 可疑的, 令人生疑的
a doubtful remedy
疗效可疑的疗法
3. 含糊的, 不明确的; 难以预测的
The future looks very doubtful.
前途看来难以预测。
4. (名声等)不好的