principal river的用法和樣例：
例句
- The sand and gravel in the Yangtze river is good building and filling materials.
摘要長(cháng)江中下游干流河道內的砂石是較好的建筑和填筑材料。 - Gezhouba Water Control Project on the Yangtze River is the first large-scale construction of water conservancy projects.
葛洲壩水利樞紐工程是長(cháng)江干流上興建的第一座大型水利工程。
principal river的相關(guān)資料：
臨近單詞
principal boy
principal
principal imports and exports
Principal variables selection
principal radius of curvature
principal chemical components
principal invariant of tensor
Principality of Liechtenstein
Principal Management Facility
Principal Component Begression
principal of automatic control
principal financial indicators
