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A hemisphere is one half of something round, especially the Earth. The Earth is divided into the Northern and Southern hemispheres (above and below the ) and the Eastern and Western hemispheres. Your brain also has two hemispheres — the left half and the right half.
半球（地球的南北半球、東西半球；也指大腦的左右半球）
組成hemi- (half, from Greek) + sphere (a round ball shape) — hemi- means 'half' in several science words.
同家族的字
- spherehemisphere 就是 sphere（球體）的一半
原始詞典資料6 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
hemispherenoun/ˈhɛmɪsfɪə/
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astrologyastronomyhuman-sciencesHalf of the celestial sphere, as divided by either the ecliptic or the celestial equator .
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A realm or domain of activity .
- Love is the Columbus of our moral world, and opens, at some period or other, a new hemisphere to our view.
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geographynatural-sciencesHalf of the Earth, such as the Northern Hemisphere, Southern Hemisphere, Western Hemisphere or Eastern Hemisphere, Land Hemisphere, Water Hemisphere etc. .
- Bangkok typically sees temperatures between 73 and 91 degrees Fahrenheit (23 to 33 degrees Celsius) during January, according to the Tourism Authority of Thailand – one reason why it’s a paradise for many tourists looking to escape winter in the northern hemisphere.
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geometrymathematicssciencesAny half-sphere, formed by a plane intersecting the center of a sphere. .
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cartographygeographynatural-sciencesA map or projection of a celestial or terrestrial hemisphere .
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anatomymedicinesciencesEither of the two halves of the cerebrum. .
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。