门清也称门前清，是国标麻将中的基本胡牌番种。现引申为某一方面很在行，是业内中人或者是熟手。
碧波白浪表示三门峡“黄河水清”的千古奇观。蓝天之上飞翔的白天鹅寓意“天鹅之城”。
The white waves show the Yellow River is very clear here and the swan means Sanmenxia City is the city of swan .
公司有健全的国际代理网络，可为客户提供门到门的物流和清关服务。
The company has a sound international agency network and is able to provide customers with door-to-door logistics and customs clearance services.
三门峡水库建成后，先后采用了蓄水拦沙、滞洪排沙和蓄清排浑调水调沙三种运用方式，水库在运用过程中也相应的分为三个阶段。
The Sanmenxia Reservoir, located in the middle reaches of the Yellow River, has passed three stages since it was built up in 1960.
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