ràng / suǒ / yǒu / rén / tóng / shí / tóng / yì / zhè / gè / fāng / àn / bǐ / dēng / tiān / hái / nán

让所有人同时同意这个方案，比登天还难。

Getting everyone to agree to this plan at the same time would be harder than reaching the sky.