sidelines
definitions
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noun
The area beside the playing field where substitutes wait or spectators stand.zh: 比赛场边的区域
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noun
Activities or interests pursued outside one's main job.zh: 本职工作之外的活动
examples
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He watched from the sidelines.
他在场边观看。
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She volunteers on the sidelines.
她在业余时间做志愿者。