They must also keep swimming to keep from sinking, since most have largely or completely lost the swim bladder, the gas-filled sac that helps most other fish remain buoyant.
它们还必须不停地游动以避免下沉，因为大多数鱼基本上或完全失去了鱼鳔，这个充满气体的囊帮助大多数其他鱼保持浮力。
The nitrogen gas precharged bladder inside the Pulse-Stop dampens the pressure pulsations created by the reciprocating action of the pumps.
氮气首先给气囊充气，以消除脉冲停止时的由往复式活塞泵产生的压力脉动。
Fish generally respire through gills. most bony fish es have a swim bladder a gas-filled organ used to adjust swimming depth.
一般是经由鳃呼吸。大部分硬骨鱼有鳔，这是源于消化管的憩室，司控制浮力或为辅助呼吸器官。
The cause of death would be gas expanded made by the intestinal blocking, septicemia caused by necrosis happened at intestinal membrane and the urine retention at bladder.
同时认为肠管内梗阻致使肠管胀气、肠壁坏死并发的败血症及尿潴留等是致死因素。
The cause of death would be gas expanded made by the intestinal blocking, septicemia caused by necrosis happened at intestinal membrane and the urine retention at bladder.
同时认为肠管内梗阻致使肠管胀气、肠壁坏死并发的败血症及尿潴留等是致死因素。
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