Reinforcement is the central factor in the acquisition of new behavior patterns.

Innovation is the key to staying ahead in the fruit industry.

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。

Sometimes the bravest thing is to keep going when everything seems lost.

I never regret my choices because that's my life.

The truth is rarely pure and never simple.