人和陆生动物排泄物含有可溶的难处理有机物质。
The excreta of humans and land animals contain soluble refractory organic matter.
水生动植物如鱼、蛙、龟、蛇等的排泄物中也会含有类似的难处理的物质。
The excreta of aquatic animals-fish frogs turtles snakes etc-contain similar refractory materials.
水生动植物如鱼、蛙、龟、蛇等的排泄物中也会含有类似的难处理的物质。
The excreta of aquatic animals - fish, frogs, turtles, snakes, etc - contain similar refractory materials.
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