安全生产是煤炭行业的生命线,任何时候都不能放松。
Sustainable development requires the joint efforts of the entire industry chain.
你今天感受到的痛苦将成为你明天的力量。
Economics is the study of how societies use scarce resources to produce valuable goods and services and distribute them among different individuals. If we think about the definitions, we find two key ideas that run through all of economics: