For example, if a plant needs protection against a leaf-feeding pest, the protective agent need not also be present in the grain (that's harvested for food).
例如，如果一种作物需要保护免于遭受一种以叶子为食物的害虫的侵害，保护剂不需要在（作为粮食而收割的）作物中出现。
We have a vast products range including personal protective supplies, apparels, shoes, handbags, digital entertainment products, auto accessories, rolled steel and leaf sping.
我们有广阔的产品范围包括个人防护用品，服装，鞋，手袋，数码娱乐产品，汽车配件，钢材，叶斯平。
The occurrence of overcompensation response of cotton plants after leaf loss and the changes in their protective enzyme system were studied.
研究了棉花在叶片损失后产生的超补偿现象和超补偿下棉叶中的保护酶活性的变化。
The occurrence of overcompensation response of cotton plants after leaf loss and the changes in their protective enzyme system were studied.
研究了棉花在叶片损失后产生的超补偿现象和超补偿下棉叶中的保护酶活性的变化。
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