在实质性内容方面必须明确；须与要约邀请相区别。

Must be definite in substance; Must be distinguished from an invitation to treat.

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晶须产品经x -射线衍射鉴定为纯相。

The whisker product is identified to be pure phase by the X-ray diffraction.

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晶须产品经x -射线衍射鉴定为纯相。

The whisker product is identified to be pure phase by the X-ray diffraction.

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