Identification of Substance » 物质的鉴定 the boys are playing football on the playground » 男孩子们在操场上踢足球 ..
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结论： 差热分析法用于对物质的鉴定，简便、快速。
Conclusion:Differential thermal analysis method are simple and speedy for to i- dentifica…
科学家已经鉴定出造成走味的瓶装啤酒带点苦的回味的化学物质。
Scientists have identified the chemicals that lead to the bitter aftertaste of stale bottled beer.
他们鉴定出四种不同的含铅物质，其中两种是人工合成的，并非天然物质。
They identified four different lead-based substances, two of which were man-made, not natural.
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