“疑问”造句

当时,许多技术专家对那种工艺抱有疑问
Many technical experts at the time had doubts about the technology.

如有任何疑问,就给我发邮件。
If you have any problems then send me some mail.

关于该病例做手术的可行性,我持有疑问
I have doubts about the advisability of surgery in this case.

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