用气泡或腮呼吸生活于南半球的多骨鱼类；有时被归为总鳍鱼类。
Bony fishes of the southern hemisphere that breathe by a modified air bladder as well as gills; sometimes classified as an order of crossopterygii.
在对水下单气泡运动受力分析及任意时间剖面多气泡运动特性研究的基础上，建立了水下气泡群运动数学模型。
Based on the force analysis of single bubble movement and movement characteristic research of many bubbles in random time section, the mathematics modeling of many bubbles movement was built up.
所以，在钢锭模内析出的气体没有沸腾钢多，但又在钢锭头产形成足够的气泡抵消大部分钢的收缩。
So less gas is. given off in the mould than with rimming steel, but enough bubbles form at the top of the ingot to counteract most of the shrinkage.
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