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Positive emotions broaden our awareness and allow us to see more possibilities.
天然气将在向低碳未来过渡的过程中扮演关键的桥梁燃料角色。
The best moments in our lives are not the passive, receptive, relaxing times... The best moments usually occur if a person's body or mind is stretched to its limits in a voluntary effort to accomplish something difficult and worthwhile.