Of course, there are still many problems. For example, due to the relatively backward technology, it is still difficult to use new energy at this stage or it is difficult to promote it on a large scale.
Of course, there are still very many problems, such as due to the relative backwardness of technology, new energy at this stage is difficult to use or large-scale promotion of the use of
Of course, there are still many problems. For example, due to the relatively backward technology, it is difficult to use new energy at this stage or to promote the use of large areas