名词短语
中文翻译：不饱和的开发者
同义词：
['unsaturated developer', 'under-saturated developer']
例句：
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1.The undersaturated developer needs to be thoroughly mixed with water before use.
在使用前，这种不饱和的开发者需要充分与水混合。
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2. The undersaturated developer is used in the production of concrete to improve its strength and durability.
这种不饱和的开发者用于混凝土生产中，以增强其强度和耐久性。
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3. The undersaturated developer was introduced to reduce the amount of cement needed in the mix.
引入了不饱和的开发者，以减少混合物中所需的水泥量。