tīng / le / bàn / tiān / tā / de / mǎn / fù / láo / sāo / dà / jiā / dōu / bù / zhī / dào / gāi / zěn / me / ān / wèi / tā

听了半天他的满腹牢骚，大家都不知道该怎么安慰他。

After listening to his endless complaints for a long time, nobody knew how to comfort him.