| 单词 | phthalic anhydride |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔phthalein〕Any of a group of chemical compounds formed by a reaction of phthalic anhydride with a phenol, from which certain synthetic dyes are derived.酞：一组化合物之一，由邻苯二甲酸酐和酚反应而成，某些合成染料是由此提取的美国传统 |
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