When the climbers looked back, they saw that two uninvited visitors had joined on.
登山者回头一望, 看见两个不请自来的游客在跟他们一起爬山。
When the climbers looked back, they saw that two uninvited visitors had joined on.
登山者回头一望, 看见两个不请自来的游客在跟他们一起爬山。
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上例句、词性分类
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