The scientists also measured breathing capacity in 2,120 schoolchildren from the communities during three periods: 1994-1998, 1997-2001 and 2007-2011.

Swimming can not only strengthen your body but also enhance your breathing capacity; it is great exercise.

游泳不但能锻炼身体，也能增强肺活量，是很好的运动。

Of the 37 tested masks from major brands in China, only nine were adequate in filtering air borne pollutants and enabling smooth breathing, said a survey conducted by the China Consumers Association in March 2014.

2014年3月，中国消费者协会展开的一项调查表明，在37个中国主要品牌的测试面罩中，只有2个品牌可以有效过滤空气中的污染物，使得呼吸顺畅。

A regular diet of bird's nest can help alleviate the trachea, smooth breathing, benefit the control of asthma, expel phlegm, recover vital energy and extend longevity.

经常食用燕窝可以帮助缓和哮喘，使呼吸顺畅，有益于哮喘控制，清痰，恢复体能和长寿。

Determination for Air Breathing Quantity of Atmospheric and Low Pressure Tank and Selection of Its Breathing Valve

常压、低压储罐呼吸量的确定及呼吸阀的选用

The equations on the maximum breathing capacity for breather valve are given by theoretical analyses and calculations, and it is considered that the diameter of breather valve to be selected should be on the basis of the maximum suction capacity of induction valve.

通过理论分析和计算，给出了呼吸阀最大通气量的计算公式，并认为呼吸阀口径的选取应以吸气阀侧的最大吸气量为依据。

Breathing Valve shall be set on roof of the fixed-roof tanks, which can make the tanks safe and reduce the loss of the stored liquids as evaporation.

呼吸阀安装在固定顶罐的通风装置，起减少油品蒸发损耗，控制储罐压力的作用，它也可与阻火器联合安装使用。

When the tank pressure of the gas control valve in the mechanical ventilator pressure within the breathing valve does not move and maintain airtight tank;

当罐内气体的压力在机械呼吸阀的控制压力范围之内时，呼吸阀不动作，保持油罐的密闭性；

Two-step Breathing Valve Can Ensure the Safety of Oil Tank

两级式呼吸阀能保证油罐呼吸安全

She was breathing using an oxygen mask.

她正在用氧气面罩呼吸。

If you're not feeling well or have symptoms such as fever, fatigue, cough and trouble breathing, a mask is also needed to prevent you from spreading viruses to others.

如果你觉得不舒服或者是出现发热、乏力、干咳、呼吸困难等症状，也应该佩戴口罩，防止病毒传染给其他人。

Connected with the exhaust vent of the breathing mask or the respirator by corrugated tubes, this device gathers exhalation containing a large amount of causative agents through the completely leakproof ductwork and then expels purified air after multiplicate disinfection by high temperature, high pressure and chemical disinfectant.

该装置以波纹软管与呼吸面罩或呼吸机上的排气孔连接，于完全密封的管道系统收集含有大量致病因子的呼出气，经高温、高压及化学消毒剂等多重杀毒灭菌后排出清洁空气。

Wear a breathing mask with an active carbon filter; do not inhale fuel vapours.

请佩戴带有活性碳过滤器的呼吸面具；切勿吸入燃油蒸气。

Breath-holding, shallow breathing and hyperventilating can all trigger something called the sympathetic nervous system ( SNS).

屏气凝神、呼吸短促和气喘吁吁都会触发交感神经系统。

However humans are used to shallow breathing;

然而，人类已习惯于浅呼吸；

The effect of positive end-expiratory pressure on the rapid shallow breathing index.

快而浅呼吸时呼气末正压通气的作用。

The main pipe, the branch pipe, and the breathing pipe all are hoses.

主管、支管和通气管均为软管。

A doctor had removed a breathing tube and was holding a phone to his face.

医生拿掉了氧气管，把电话举到他面前。

He was later seen nearby 'shouting and screaming'. The agitated yob was breathing heavily and holding a knife with blood on the handle.

但是他的左臂和肩膀已经被刺伤，随后有人看到他在附近大喊大叫。丧失理智的何某大喘着粗气，手里握着带血的刀。

Action: Lean the trunk forward slowly and you will feel stretching on lower back ( Fig6), keep breathing and holding the position for30 seconds.

动作：身体慢慢向前弯曲，你会感觉到背部被拉伸的感觉（图6）。

Clinical study of cerebrovascular reactivity in cerebral infarction by transcranial color Doppler ultrasound and breathing-holding test

经颅彩色多普勒超声结合屏气试验评价脑梗死患者脑血管反应性