名词
中文翻译：选择者
同义词：
['selector', 'filter', 'purifier']
例句：
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1. The selective fertilizer helps plants grow more efficiently.
这种选择性肥料帮助植物更有效地生长。
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2. The selective breeding process is used to create new varieties of crops.
选择性育种过程用于创造新的农作物品种。
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3. The selective pressures on the environment are increasing due to human activities.
由于人类活动，对环境的选择压力正在增加。