换气

• Ventilation is carried out according to the minimum air volume in the specifications
  并按说明书中的最低通风量进行通风换气。
• That ' s because you don ' t know the key to doing it well , controlling your breathing
  那是因为你不知道关键所在，这关键在于换气。
• A polar bear may sit for hours at a breathing hole , waiting for a seal to surface
  一头北极熊会在呼吸口边坐上数个小时等待海豹出来换气。
• Some children can cover the whole length of the pool without coming up for breath even once
  有些孩子能够跑完游泳池的全长而不用露出水面换气。
• With approval , airflow may set back to 6 air changes per hour when space is unoccupied
  如经过同意，当实验室无人时，可以将换气量降为6次每小时。
• Some children can cover the whole length of the pool without coming up for breath ewn once
  有的孩子一次也不用露出水面换气，就能到达池子的另一头。
• Thermal insulation in buildings - determination of air change in buildings - tracer gas dilution method
  建筑物隔热.建筑物中换气率的测定.示踪气体稀释法
• And i open the balcony door , to air the room , and free it of the yesterday stinking cigarettes ' smell
  我打开阳台的门，给房间换气冲散昨晚残留的烟臭味。
• And we have come to breathe to the side so that the timing is more similar to normal butterfly swimming
  我们采取侧面换气，这样节奏就更接近于正常的蝶泳。
• Calculation of ventilating rate and analyses of field measurement for underground garages of civil buildings
  民用建筑地下停车库通风换气量计算及现场实测分析