英语语法分析

During this period, they have learnt how to distinguish poisonous snakes form innoxious ones and often catch them to eat.

在这个过程中，他们学会了识别有毒的蛇和无毒的蛇，并经常抓无毒的蛇来吃。

They are green outputs of pollution free, innoxious, water proof, anti-fire, erosion resistance, fast color and non-deformation.

该产品无污染放射元素，对人体健康无害、能防水、防火、抗腐蚀、不退色、不变形，符合环保要求的绿色产品。

They are green outputs of pollution free, innoxious, water proof, anti - fire, erosion resistance, fast color and non - deformation.

该产品无污染放射元素，对人体健康无害、能防水、防火、抗腐蚀、不退色、不变形，符合环保要求的绿色产品。