| 单词 | 如铝化合物 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔earth〕Chemistry Any of several metallic oxides, such as alumina or zirconia, that are difficult to reduce and were formerly regarded as elements.【化学】 难以还原的氧化物：某种金属氧化物，如铝化合物、锌化合物，难以被还原成元素的美国传统 |
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