1·It expels gas to descend, and expels water from trim bladders to rise.
它通过排出气体来下降，并通过把水排出气囊来上升。
2·With a thin scream, like a tea-kettle whistle, the medusa starts to descend.
随着一声像茶壶煮开了水那样的微弱的叫声，水母开始下降。
3·The pilots did descend to the wrong altitude then, thinking they were following the air controllers' instructions.
飞行员确实以错误的高度下降，并以为他们遵循了空中管制员的指示。
4·It would need to deploy a parachute, descend through the clouds and transmit a GPS coordinate to a cell phone tower.
它需要打开降落伞穿过云层下降，把 GPS 坐标发射到手机基站。
5·This morning I simply dived into deep water off the rocks nearest to the house, where they descend almost sheer, yet with folds and ledges enough to make a precarious stairway.
今天早上我只是在最靠近房子的礁石深水处潜水。 那里的石头陡然下降，多处坑壑和暗礁形成了一段不稳固的阶梯。
1·The test results show that the pressure descend of new filter conform to the requirement of standard, the filtration efficiency is 63.04%, and the traditional filter is no less than 60%.
试验结果表明，新型滤器的压力降完全符合规定要求，原始滤清效率为63.04%，而传统滤器的原始滤清效率仅为60%。
2·The smoke layer can been in definite height and not descend when the smoke exhaust rate is larger than that of generating smoke.
当中庭排烟速率大于或等于产烟速率时，烟气层就能够保持在一定高度上不降下来。
3·To descend by means of a parachute.
跳伞，伞降用降落伞。
4·Descend blood grease medicine kind is more, classification is also more difficult.
降血脂药种类较多，分类也较困难。