名词短语
中文翻译：化学改良剂
同义词：
['chemical additives', 'chemical reagents']
例句：
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1. The newchemical amendments have been shown to improvecrop yields.
新的化学改良剂已被证明可以提高作物产量。
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2. The company uses chemical amendments to make its products more durable.
该公司使用化学改良剂来使产品更耐用。
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3. The chemical amendments were tested forsafety before they were released into the environment.
这些化学改良剂在释放到环境中之前，都经过了安全性测试。