Nobody should talk down his own achievements.
任何人都不应该贬低自己的成绩。

Some foreign media outlets are talking down China, claiming that there will be a hard landing for the Chinese economy.
国外又出现 “唱空中国”的一种舆论，说中国经济要硬着陆。

They even blame the local government for talking down the region's biggest industry.
他们甚至指责当地政府贬低本地区最大的产业。