Doctors might also administer the steroids dexamethasone or hydrocortisone to a newborn if the infant has low blood pressure or needs a breathing tube for a prolonged period.

医生也可能会对一个新生儿使用类固醇地塞米松或氢化可的松，如果婴儿有低血压或需要长时间的呼吸管。

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Inside the tube you create a low pressure environment very similar to an airplane that's at high altitudes.

在管道内部我们会创建低压环境，类似于在高海拔飞行的客机。

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The pressure proportional elastic deformation of this bourdon tube is transmitted through a low friction movement to the knife edge pointer.

波登管的压力比例塑性变形通过摩擦力很小的机械装置传递给刃形指针。

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And what is inside the gas discharge tube is gas at low pressure.

气体放电管里,有处于低压下的气体。

麻省理工公开课 - 固态化学导论课程节选

And this was a tube at low pressure.

这是一根低压条件下的试管。

麻省理工公开课 - 固态化学导论课程节选

Stratram would need to overcome a lot of challenges, particularly if squishy humans were among the things being transported into space: the track would need to be around 1, 000 miles long to avoid the kind of instant acceleration that could crush a human, and the train would need a low-pressure vacuum tube to travel through.

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