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这棵树看上去又高又壮，实际上树干是空的。
The tree looks high and strong but ___ its trunk is hollow.
youdao
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这棵树看起来又高又壮，实际上树干是空的。
This tree looks high and strong but actually its trunk is hollow.
youdao
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这棵树看起来又高又壮，实际上树干是空的。
This tree looks high and strong but actually its trunk is hollow.
youdao