我的語法不太好。覺得“has been slow down”的slow down 是動詞短語,
是不是應該變成has been slowing down呢?
一起切磋學習哈。。:)
我的語法不太好。覺得“has been slow down”的slow down 是動詞短語,
是不是應該變成has been slowing down呢?
一起切磋學習哈。。:)
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