residual
/rɪˈzɪdjuəl; ?@ -dʒu-; rɪ`zɪdʒʊəl/ adj[usu attrib 通常作定语]
left over as a residue(1); remaining （作为剩余物）存留下来的; 剩余的; 残余的
residual chalk deposits, ie left after rocks have been eroded 残余白垩沉积（岩石经侵蚀後的）
a few residual faults in the computer program 计算机程序中的少许残留误差.