为了解释气囊如何改变声音，de Boer博士制作了口腔、舌和喉的塑料模型，并压入空气使之发出不同的元音。
To find out how having an air sac changed the sounds produced, Dr DE Boer created plastic models of the mouth, tongue and throat and forced air down them to produce different vowel sounds.
在实验室条件下，使用自制分离器及浆化剂进行油砂分离试验，并通入空气来提高油砂分离效果。
Under the condition of laboratory, the self - control separation vessal and slurry reagent was wsed to carry out the experiment of oil and sand separation.
在电铸槽底部设一布满微孔的排气管，并通入无油压缩空气起搅拌作用；
The bottom of the electric casting tank is provided with an exhaust pipe which is besprinkled with tiny holes, and oil-free compressed air are put in the exhaust pipe to play stirring action.
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