When the radiant energy of the sun falls on the earth, it is changed into heat energy, and as a result the earth is warmed.
当太阳的辐射能落在地球上时， 就变为热能，于是， 地球暖和起来了。
When the radiant energy of the sun falls on the earth it is changed into heat energy, and as a result the earth is warmed.
当太阳的辐射能落在地球上时，就变为热能，于是，地球暖和起来了。
The question asked is, how much of the radiant energy from the sun that falls on a plant is converted into plant organic matter?
要问的问题是：照射到植物上的太阳辐射能有多少转化成植物有机物呢?。
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