Tā / fǎn / fù / jiě / shì / tóng / yī / gè / wèn / tí / què / tú / láo / wú / yì / dà / jiā / hái / shì / méi / yǒu / lǐ / jiě

他反复解释同一个问题，却徒劳无益，大家还是没有理解。

He repeatedly explained the same issue, but it was futile and no one understood.