单词	pitch envelope
释义	pitch envelope 基音轨迹
随便看	Hydrogen-elimination catalyst hydrogen-elimination catalyzer hydrogen elimination technology hydrogen eliminator Hydrogen Embonate,Noscapine hydrogen embritflement hydrogen embrittlement hydrogen-embrittlement hydrogen embrittlement crack hydrogen embrittlement fracture hydrogen embrittlement mechanism Hydrogen Embrittlement of Carbon Steels Hydrogen Embrittlement of Stainless Steels Hydrogen Embrittlement Risk Management IFI Hydrogen embrittlements Hydrogen embrittlement sensitivity hydrogen embrittlement torque hydrogen embrittleness hydrogene mineral hydrogene minerals hydrogen emission region hydrogen enbrittlement hydrogen end group hydrogen energy hydrogen energy automobile