Bone meal is great fertilizer.
骨粉是很好的肥料。
The fluoride in phosphate fertilizer production can not only impair workers' upper respiratory tract, bone and teeth, but also lead to fluorosis of bone.
结论磷肥生产中氟化物对作业工人上呼吸道，骨骼和牙齿有损害作用，可导致氟骨症。
The fluoride in phosphate fertilizer production can not only impair workers' upper respiratory tract, bone and teeth, but also lead to fluorosis of bone.
结论磷肥生产中氟化物对作业工人上呼吸道，骨骼和牙齿有损害作用，可导致氟骨症。
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