单词	opal; black
释义	Opal; black黑色蛋白石礦物學名詞
随便看	upper-level jet upper-level jet (stream) upper-level jet stream upper-level low upper level processor management upper-level ridge upper level switching center upper-level threshold upper level trough upper-level trough upper-level weather chart upper-level westerlies upper-level wind upper-level winds upper-lift corner upper limb upper limb orthosis upper limb prosthesis upper limit upper limit function upper limit--limit superior upper limit of flammability upper limit of integral upper limit of speed regulator upper limit of stability