We compare these signatures with those of particular elements like zinc or lead, to determine what the pigment was made of.

我们将这些特征与锌或铅等特定元素的特征进行比较，以确定颜料是由什么构成的。

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To compare the compositions of a meteorite and the Sun, it is necessary that we use ratios of elements rather than simply the abundances of atoms.

为了比较陨石和太阳的成分，我们需要利用元素的比率，而不单单是原子的丰度。

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Here, the parser tests combinations of tokens to see how they compare to the abstract elements in its grammar.

在这里，解析器检测标记间的结合同其语法中的抽象元素的匹配程度。

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