a short journey or trip, especially one engaged in as a leisure activity
远足;短途旅行
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an excursion to Mount Etna 到埃特纳火山去的一次旅游
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figurative 〈喻〉occasional excursions into mathematics .对数学的偶尔涉足。
〈技〉 移动。
a deviation from a regular pattern, path, or level of operation
偏移;偏离。
〈古〉 离题。
"late 16th cent. in the sense ‘act of running out', also meaning ‘sortie' in the phrase