?努力研读

... blow up 表现失常;吹风 bone up on 努力研读 bottoms up 干杯 ...

?专心致志于

... bone turquoise 齿松石,骨绿松石 bone up on 专心致志于 bone 骨 ...

?专门钻研

专门词汇 lexicon 专门钻研 bone up on ;boned up on 专靠自己 paddle her own canoe ;paddle his own canoe ;paddle my own canoe ;paddle our own canoe ;paddle thei...

?钻研

... feel in ones bones坚信；确信 make no bones about毫不犹疑；毫无顾忌 bone up on钻研 ...