常見例句雙語例句Internal heat sources can influence the jet by as much as a factor of two, one is the negative buoyancy and the other is the secondary natural convective flows produced by heat sources;室內(nèi)熱源對送風(fēng)射流的影響途逕主要包括兩個方麪：一是送風(fēng)射流與周圍氣流密度差所形成的浮力作用，二是室內(nèi)熱源所産生的熱浮陞氣流； 返回 buoyancy flows