单词	black streak
释义	Black streak皮囊Black streak皮囊林學
随便看	backward search for block[sequence]number backward search for block（sequence）number backward search for particular data backward search for program alignment function backward season backward selection model backward sequence backward sequence number backward shift backward shifting backward shift operator backward sight backward signal backward signaling path backward-sloping letter backward somersault backward speed backward spinning backward stagger backward step backward stroke backward student backward substitution technique backward sunspot backward supervision