adv.怀疑地，迟疑地，迟疑不决地，犹豫不定地

He regarded the news with doubtfully raised eyebrows.
他听到这消息时眉梢上挑，表示怀疑。
She smiled doubtfully at his assurance that everything would be fine.
她对他保证一切都会好的说法持怀疑态度地笑了。
The scientist looked at the data doubtfully, unsure if it was accurate.
科学家疑虑地看着这些数据，不确定其准确性。
I doubtfully wondered whether this new strategy would really work.
我疑惑地想，这个新的策略是否真的能奏效。
The patient's improvement was so sudden that the doctor looked at him doubtfully.
病人的恢复如此迅速以至于医生看着他时满腹狐疑。
They received his explanation with a doubtfully collective nod.
他们对他的解释报以集体的、充满疑虑的点头。
The weatherman predicted sunshine, but many people doubtedly watched the dark clouds gathering outside.
气象员预报会有阳光，但许多人看着外面聚集的乌云心存疑虑。
She listened to his proposal doubtfully, not convinced by his promises.
她怀疑地听着他的提议，并未被他的承诺所说服。
The critics expressed doubtfully about the artist's ability to replicate her previous success.
评论家们对于这位艺术家能否复制此前的成功表示怀疑。
Despite his confident tone, I still viewed his plan doubtfully.
尽管他语气自信，但我仍然对此计划持怀疑态度。