闷人的空气

The air anion is to have the negative charge air numerator , may make person be in high spirits , improve human body enginery, the air "vitamin" is called by people, may make person feel air "is stale " if being short of an anion , feel that the sense of suppression in the chest, gets nervous , dizziness , adyramia , availability and situation come down obviously.

空气负离子是带负电荷的空气分子，可使人精神振奋，提高人体机能，被人们称之为空气"维生素"，若缺乏负离子可使人感到空气"不新鲜"，感到胸闷、心慌、头晕、无力、工作效率和健康状况明显下降。

Because air is not current, by the oxygen in the nest not enough, each organ cannot get enough oxygen to supply inside body, awake later generations can feel dizziness, bosom frowsty, lack of power, spirit is depressed, still can cause daydream, and often nightmare again and again, person easy Cong Mengzhong sleeps lightly.

由于空气不流通，被窝里的氧气不充足，体内各器官得不到足够的氧气供给，醒来后人会感到头晕、胸闷、乏力、精神不振，还可以诱发做梦，而且经常是恶梦连连，人易从梦中惊醒。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。