煤炭是我国的主体能源,在相当长时期内仍将是我国能源安全的基石。
The beauty of mathematics lies in its ability to describe the world in a precise and elegant way.
In business, as in life, integrity is the only currency that never loses its value.
人们总是认为他们会写一本书。他们认为他们会写一本书,然后他们没有。
If it doesn't challenge you, it won't change you.