waterwings
常见例句
- The children use waterwings to keep themselves up in the water while they're learning to swim.
孩子们在学游泳时常用浮圈使自己浮在水面。 - Bed Evolution Analysis for Shiping-Yumenkou Section Waterw ay of Yellow River North Main Stream
黄河北干流石坪至禹门口段航道河床演变分析 返回 waterwings