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有时候,最难的事情和正确的事情是同一件事。
Sometimes, the hardest thing and the right thing are the same.
Every challenge is an opportunity in disguise—if you're willing to look for it.
The more the division of labor and the application of machinery extend, the more does competition extend among the workers, the more do their wages shrink together.
可持续性已不再是一种选择,而是我们对后代的责任。