As for the poor scoring of apps, it can be explained by the lack of great interfaces for smartphones, and the still relatively small penetration of tablets.
智能手机缺乏很好的阅读界面以及依旧相对较低的平板电脑拥有率则能解释应用的低支持率。
2
Passive infrared penetration is poor, the human body easily block the infrared radiation not be receiving probe.
被动红外穿透力差，人体的红外辐射容易被遮挡，不易被探头接收。
3
The sensitivity of diffuse optical tomography (DOT) imaging exponentially decreases with the increase of photon penetration depth, which leads to a poor depth resolution for DOT.