Four pins means you can have four sensors, say two temperature sensors, one for ambient and the other for panel temperature, a light sensor, and a wind speed sensor.

四个插脚意味着可以有四个传感器，比如两个温度传感器(一个用于外界温度，一个用于面板温度)、一个光传感器和一个风速传感器。

youdao

One panel will discuss the failings of the discipline in light of the financial crisis.

有个座谈小组将讨论针对金融危机，该学科暴露出的缺点；

youdao

Meanwhile, many solar panel companies are developing related approaches for increasing the amount of light a solar panel will absorb.

同时，许多太阳能板公司正在开发能使太阳能板吸收更多阳光的相关技术。

youdao

How it works:Ones and zeroes of digital data are first converted into checkerboard "pages"of bright and dark pixels using a liquid-crystal panel called a spatial light modulator.

FORBES

The upper flashing lights are integrated into the roof panel, eliminating the need for a bolted-on light bar that causes aerodynamic drag -- reducing fuel economy -- and can lead to rust.

CNN: Cops help dream up high-tech police car

Apple has asked companies in its supply chain to develop flat panel modules and LED light bars for two iPad prototypes code-named J1 and J2, the story says, adding that TPK Holding will begin to supply touch panels to Apple in November before Wintek start ships similar parts in December.

FORBES: Apple Reportedly To Overhaul All Products In 2012