Prehnitene
[化] 连四甲苯; 1,2,3,4-四甲基苯
🗣️ 情景例句
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He believed that everyone should be prepared to do heavy work, from the leaders to the poorest peasants.
他认为从领袖到最穷苦的农民，每个人都该乐于从事重体力劳动。