Wushan copper deposit is an important part of Fe, Cu and an metallogenetic belt in the middle and lower reaches of the Yangtze River.

江西武山铜矿床是长江中下游铁、铜、金成矿带的一个重要组成部分。

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Practically every river has an upper, a middle and a lower part.

事实上每条河都有上游、中游和下游。

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Rhizomes curved; ocrea: lower part green, upper part brown, cleft to middle.

根状茎弯曲；托叶鞘：下半部分绿色，上半部分棕色，半裂至中部。

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In India, the middle class is largely a new political movement as the lower-middle class plays a significant part in general elections votes.

FORBES: The Finances Of The Global Middle Class