No parent volunteers, no field trips.
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no field trips
没有实地考察
以上为机器翻译结果，长、整句建议使用 人工翻译 。
没有家长志愿者，就没有野外旅行。
youdao
Everything -- tutoring, soccer and occasional field trips -- is provided at no cost, something the kids appreciate, as nearly all of them know that money is tight at home.
CNN: Soccer helping young refugees find footing in U.S.
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