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月下
可疑的 kěyíde

doubtful [ˈdaʊtfʊl] ADJ

1. doubtful:

doubtful
可疑 kěyíde
doubtful
怀疑 huáiyíde
be [or feel] doubtful about [or of] sth

2. doubtful:

doubtful
可能 kěnéng de
doubtful
不一定 bùyīdìngde
▶ doubtfully ADV

PONS OpenDict

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Examples from the PONS Dictionary (editorially verified)

Monolingual examples (not verified by PONS Editors)

It is doubtful the mangrove forests can sustain this level of harvesting.
en.wikipedia.org
Early designs allowed for the pilot to escape after the final acceleration towards the target, although whether this could have been done successfully is doubtful.
en.wikipedia.org
This opinion was pronounced neutral; a second inquiry was called for, and this time the qualifications of the expert for the task were doubtful.
en.wikipedia.org
Therefore, in no doubtful case will the judiciary pronounce a legislative act to be contrary to the constitution.
en.wikipedia.org
Without the existence of statistical estimates of chance collisions, conclusions based on comparison alone are thus viewed as doubtful.
en.wikipedia.org