The middle reaches of Heihe river is the second largest inland valley in the arid region of northwestern China.

黑河中游是我国西北干旱区开发历史较早，绿洲化程度较高的第二大内陆河流域。

youdao

The model and method are not only applicable to typical study regions, but also to the middle reaches area of the Yellow River.

所建模型和方法不仅适用于典型研究区域，而且也适用于黄河中游地区。

youdao

The wetland in the middle reaches of Yangtze River has been greatly damaged for excess exploitation and unreasonable utilization.

长江中游湿地由于人类对其不合理的开发和利用，遭到了极大的破坏。

youdao

Beginning on the fifth day of the fifth lunar month, people of several ethnic groups throughout China and the world celebrate the Dragon Boat festival, especially in the middle and lower reaches of the Yangtze River.

UNESCO: Culture

It would start by addressing the way in which middle-class income is drained off before it ever reaches the middle class.

CNN: A good start to reviving the middle class

The underground economy also reaches into the middle class and places like sports bars.

NPR: Getting Paid Off the Books in America