waterwings

常見例句

• The children use waterwings to keep themselves up in the water while they're learning to swim.
  孩子們在學(xué)游泳時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
  黃河北干流石坪至禹門口段航道河床演變分析
返回 waterwings