复数： inhalers

Step 2 - hold the inhaler about 1-2 inches in front of the mouth .

第二步：把吸入器举在嘴前1-2英寸的位置。

Whenever someone uses the inhaler , it broadcasts the location and time to a central computer .

每当有人使用吸入器时，吸入器就把位置和时间播报到中央计算机。

Ametered dose inhaler ( mdi ) is a device used to deliver asthma medication directly to the lungs .

需要比每4小时一次更频密地使用哮喘药物（喷雾剂或吸入器）

Step 3 - press down on the inhaler to release the medicine as you start to breathe in slowly .

第三步：按压吸入器，释放药物，同时缓慢吸气。

It is a sensor that attaches to an asthma inhaler and uses satellite-positioning data to enable patients and researchers to work out which environments make their condition worse ( such as proximity to a particular type of crop ) .

它是种探测器，装在哮喘吸入器中，利用卫星定位数据使患者和研究人员了解什么样的情况会加重病情（比如接近某种特定的农作物）。