无风

• It ' s hard sailing when there is no wind
  无风难驶船
• It was a calm , cloudless day
  那是个无风少云的日子。
• Scaffolding construction of concrete filled steel tube arch bridge with no wind - support system
  无风撑钢管混凝土拱肋的支架施工
• The air was still
  风平静，无风。
• But they were five hundred miles south of the wall , and the air was still and cold
  但是他们在界墙以南五百英里，空气冰冷无风。
• Tropical calm zone
  热带无风带
• Lay down to view and admire the stars in the sky in a clear night
  一个清朗无风的夜晚，独自一人仰面躺下来静静地观赏天上的点点繁星。
• But even on windless days the air always smelt of something under - earth : sulphur , iron , coal , or acid
  甚至无风的时候，空气里也带着一种地窖下的什么恶味。
• The beaufort scale is divided into 13 levels , from the calm wind of force 0 to hurricane wind of force 12
  蒲福氏风级分为十三级，从无风的零级到飓风的十二级。
• The major pollinators are tripidae and some other insects , which belong to hymenoptera and lepidoptera , respectively
  两物种是虫媒异花授粉植物，无风媒传粉机制。