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明显的是新生儿不应该睡在不牢固的床上。
Apparently newborns should not sleep with anything loose in the crib.
youdao
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但是它的牙齿不牢固了。
But its teeth are weak.
youdao
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这座房子的地基不牢固。
The grounds and buildings of a military base.
youdao
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这座房子的地基不牢固。
The grounds and buildings of a military base.
youdao