单词	track ball
释义	track ball 跟踪球
随便看	boundary water course boundary water drive boundary waters boundary wave boundary wavelength boundary zone boundary zone of capillarity bound atom bound(-atom) cross-section bound-atom cross-section bound-atom scattering cross-section bound auxin bound away bound back bound bailiff bound-bailiff bound barrel bound bitumen bound book bound-bound energy transition bound-bound laser bound-bound transition Bound Brook bound buttonhole bound by 拱拱1 拱2 拱3 拱4 拱手听命拱手而降拱手让人拱挹指麾拱揖指挥買い主買い付け買い付ける買い入れる買い出し買い切る買い初め買い占める買い取り買い取る