单词	track ball
释义	track ball 跟踪球
随便看	roughing impression roughing-in roughing it roughing lathe roughing line roughing loam roughing machine roughing mill roughing mill grease lubrication system roughing mill group roughing milling cutter roughing-out roughing out roughing-out machine roughing-out pass roughing out pass roughing out sieve roughing-out sieve roughing pass roughing planing tool roughing pump roughing reamer roughing-roll roughing roll roughing roller 掂人分量放小菜碟儿掂分量掂斤两掂过子掇不的轻，负不的重掇臀捧屁掇臀捧屁，吮痈舐痔授之以鱼，不如教之以渔授之鱼，不如授之以渔授书不在徒多，但贵精熟。南南南下南中南京南京玉南京虫南京豆南京錠南北