万一: just in case, if by any chance, contingency...
优化: optimization, to optimize, to make superior...
逊色: inferior (often in the combination, not in the least inferior)...
融化: to melt, to thaw, to dissolve, to blend into, to combine, to fuse...
参与: to participate (in sth)...
臂: arm...
里: inside, internal, interior, village, within, inside, Chinese mile, neighborhood, li, a Chinese unit of length = one-half kilometer, hometown...
业务: business, professional work, service...
缝: seam, crack, narrow slit...
渣子: dregs, bits, dregs (of society)...
