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We presume that substances have a real essence and underlying structure.
我们认为，物质具有本质和内部结构。
youdao
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The underlying structure of this building is no doubt very firm.
这座楼的底层结构无疑是牢固的。
youdao
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The underlying structure of this building is no doubt very firm.
这座楼的底层结构无疑是牢固的。
youdao