英文：Emission and propagation of energy in the form of rays or waves.
中文：發射以光線或波的形式發出和傳播能量
英文：The systematic propagation of a doctrine or cause or of information reflecting the views and interests of those people advocating such a doctrine or cause.
中文：宣傳活動對一個學說、事業或信息的系統宣傳, 其反映倡導該學說或該事業的人的觀點和利益
英文：A group of organisms having common ancestors and certain distinguishable characteristics, especially a group within a species developed by artificial selection and maintained by controlled propagation.
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