有专家质疑这项数据的来源,要求公开调查过程。Yǒu zhuānjiā zhìyí zhè xiàng shùjù de láiyuán, yāoqiú gōngkāi diàochá guòchéng.Some experts questioned the source of this data and requested that the investigation process be made public.
我从来没有质疑过他的诚意。Wǒ cónglái méiyǒu zhìyí guo tā de chéngyì.I have never doubted his sincerity.
消费者开始质疑这款产品的广告是否真实。Xiāofèizhě kāishǐ zhìyí zhè kuǎn chǎnpǐn de guǎnggào shìfǒu zhēnshí.Consumers began to question whether this product's advertising was true.