其中三分之一的儿童还随身携带一个背包，内置空气取样器和GPS，以便将取样器的显示数据和确切位置相匹配。

A third of the kids also carried a backpack fitted with an air-sampling device and a GPS to pair up readings and precise locations.

此后，我们开始和这家公司合作，结合他们的空气取样器，开发出了商业生产原型。

Since then we've been working with this company to develop a commercial prototype incorporating their air sampler.

本采样装置包括取样器、起吊架及分样台。

The device includes a sampler, a hanger and a sample separation plate.

这种取样器只能用在能涉渡的浅水河流上。

This sampler can be used only in streams shallow enough to be waded.

这里是空气轨。

Here is the air track.