词汇	soil test phosphorus level
释义	soil test phosphorus level 土壤测试磷
随便看	derivation of word sense Derivation on Infinite Matrix Rings derivationpareto derivation polynomial symmetric interpolation derivation principle derivation process derivation regulating action derivation rule derivative derivative absorption spectroscopy Derivative absorption spectrum derivative accounting convention derivative accumulation derivative AC polarograph derivative acquisition derivative action derivative ac-tion derivative action coefficient derivative-action coefficient derivative action control derivative action controller derivative action factor derivative action gain derivative action rate derivative action time