sixbyn.六轮大卡车sixnum.六six coordinate complex六配位络合物six degreed of freedom六自度six sequence component六序分量法six-fold wooden rule六折木尺six thousand and sixty(=6060) 六千零六十Six-banded armadillon.六带犰狳属Six-minute walk test脑钠素six channel two-tone六路双音six thousand and forty(=6040) 六千零四十six-year high school六年制中学