This flashcard states that after chemical assay, they have known the composition of the ore.
这张卡片说明经过化学分析，他们知道了矿石的构成。
| Expression | 经过化学分析，我们知道了矿石的构成。 |
|---|---|
| Meaning | After chemical assay, we have known the composition of the ore. |
| Reading | jīngguò huàxuéfēnxī wǒmen zhīdàole kuàngshí de gòuchéng |
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