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高@设计师
iheardthathernewbookwouldcomeoutthenextweek.信仰很高兴为你解答！
游客小孩儿
He has been here.
敏足一世
He's been here for 10 years.这个强调的是“在这”如果强调“来”，就改成He came here 10 years ago.
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