When most people think about gas masks or respirators, what they usually envision is a tight-fitting plastic or rubber face mask with some sort of filter cartridge.

大多数人想到防毒面具或呼吸器时，脑海中呈现的是一件配有某种过滤罐的、塑料或橡胶材质的密闭面具。

youdao

Through nonlinear fitting on clastic coal core gas desorption laws in Jiedong mine, compared each desorption model of the loss to the loss of volume by calculation methods.

通过对街洞矿区碎屑状煤芯瓦斯解吸规律的非线性拟合，对各解吸模式的损失量与用计算方法所求得的损失量进行了比较。

youdao

The algorithm of radiance spectra and transmittance spectra in measured region was proposed, and the method of retrieving gas concentrations with NLLS fitting algorithm was also proposed.

提出了辐射光谱、测量区域内大气透过率谱的算法模型，以及应用非线性最小二乘拟合算法实现气体浓度反演的方法。

youdao

Ultimately, the particular card you choose also depends on how you envision your gas rewards credit card fitting into your payment arsenal.

FORBES: How To Save $250 On Gas Yearly -- Without Buying A Prius