chaffn.谷壳；糠；揶揄v.开玩笑；戏弄chaff scattering箔条散射Chaffee's antigen普利姆簇chaff flower root牛膝chaffer extension颖糠筛延长部chaff interference箔条干扰chaffer laboratory初筛实验室chaff cutter blade切草机刀片chaffs' scattering普里亚尼奇尼科夫chaff cutter knife铡草机刀片Chaffee spark-gap查菲放电器