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The balance between economic growth and environmental responsibility is the defining challenge of our time.

The most valuable crop we can grow is the next generation of farmers.

父親們最根本的缺點，在于想要自己的孩子為自己爭光。

The true value of a tree is measured in decades, not dollars.

"When you do something best in life, you don’t really want to give that up – and for me it’s tennis."

I think it's important to have a sense of humor about yourself and not take yourself too seriously.