Events and the elements that generate or respond to them are important aspects of any event emittingsystem.
事件、发出事件或响应事件的元素，它们任何事件系统的重要内容。
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The least-cost option to lower the risk is to start now and steadily transform the global energy system over the coming decades to low or zero greenhouse gas-emitting technologies.
The sun, in addition to emitting radiation, emits a stream of ionized particles called the solar wind that affects the Earth and other planets in the solar system.