Free Direct Light的意思|示意

Shining sunlight onto silicon is the most direct way of turning it into electricity (the light knocks electrons free from the silicon atoms), but it is also the most expensive.

阳光在硅上照射，能最直接的转化成电（光碰触电子使其脱离硅原子），不过这也是最贵的方法。

The effects of experimental factors and the laws of light-induced discoloration of veneers under direct painting method and free film covering method were investigated and compared.

研究分析了单板光变色的规律和试验因子的影响，并对直涂和覆膜的涂饰方法进行了试验对比。

Solar cells work because visible and ultraviolet light are powerful enough to knock electrons free from atoms. The electrons go on to form a useful direct current.

太阳能电池的工作原理是：可见光和紫外光轰击物体时足以使电子从原子中逃逸出来形成光电子，光电子进而形成可利用的直流电。