书上说的英文

标牌用read 信用say

应该是光照吧，植物不都进行光合作用吗，依赖于光把空气土壤中的无机物转化为有机物来供自己生长。The reason relies in that, the plants need light for photosynthesis to gain energy for their growth. In this process, under the help by light, the plants convert the minerals from the air and soil to the organics as the energy source.参考：Photosynthesis is a process that converts carbon dioxide into organic compounds, especially sugars, using the energy from sunlight. Photosynthesis occurs in plants, algae, and many species of bacteria, but not in archaea.Photosynthesis is vital for all aerobic life on Earth. As well as maintaining the normal level of oxygen in the atmosphere, nearly all life either depends on it directly as a source of energy, or indirectly as the ultimate source of the energy in their food

I think lighting here means sunlight. because all the energy on the earth is directly or indirectly from the sun.

应该是read，因为是人去读（看）信

书、通知你可以写 I read that...from (books...)信的时候，你可以说John wrote me that... 电视里，你可以说 Smith said that...对于mention，一般来说只是提到，没有做重点，你也可以对于信或者电视里的句子运用。John mentioned that... in some TV show/ in the letter.