Heat from the sun is infinite.
Anh văn - Lớp 10
In 1892, Mr. Rudolph designed an engine diesel engine.
Anh văn - Lớp 10
Solar energy,, has not been made full use.
Anh văn - Lớp 10
We are afraid of the radiation from the nuclear plants.
Anh văn - Lớp 10