词汇	most stubborn problem
释义	most stubborn problem 最棘手的问题
随便看	polycrystalline growth polycrystalline ice polycrystalline ingot polycrystalline iron polycrystalline iron fiber polycrystalline iron fibers polycrystalline irons polycrystalline laser polycrystalline layer polycrystalline mandrel polycrystalline manmade carbon fiber polycrystalline man made carbon fiber polycrystalline manmade carbon fibre polycrystalline man made carbon fibre polycrystalline man-made carbon fibre polycrystalline material polycrystalline material microstructure polycrystalline material microstructures polycrystalline materials polycrystalline material synthesis polycrystalline metal polycrystalline metal whisker polycrystalline mullite fibre polycrystalline nickel polycrystalline nodule