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The ultimate search engine would understand everything in the world. It would understand exactly what you meant, and it would give you back exactly what you wanted.
The health of our oceans reflects the health of our leadership.
科学家的责任不仅限于实验室,还包括更广泛的社会。
善于灭火的人,不会迎着烟雾去扑;善于防备水灾的人,不会在水流湍急的地方去防护。