Chlorophyll is a green substance in plants that absorbs energy from sunlight and helps them grow.
叶绿素是生长在植物中的绿色物质，它能吸收阳光，促进植物生长。
The solar cell can convert the energy of sunlight into electric energy.
太阳能电池能把阳光的能量转化为电能。
Young people usually have more energy than the old.
青年人通常比老年人精力充沛些。
