We conclude that the two substances have combined to form the new material.
我们得出这样的结论：两种物质化合而形成新的物质。
This mixture resolves into two substances.
这混合物会分解成两种物质。
Mingle these two substances before the experiment.
实验之前先将这两种物质混合起来。
On being heated, the two substances form a new compound.
(介词宾语)这两种物质一遇热就生成新的化合物。
On being heated, the two substances form a new compound.
(介词宾语)这两种物质一遇热就生成新的化合物。
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