smooth的近义词/同义词有：slick, even, level, sleek, glossy, polished, chivalrous, pleasant, polite, suave, velvety, even, slick, flat, sleek, polished, slippery, satiny, level, creamy, silky, sleek, silence, fluent, graceful, sli...
disadvantageous的近义词/同义词有：unpropitious, unfavourable, inopportune, ill-starred, inauspicious, adverse, unlucky, unwise, inexpedient, imprudent, injudicious, inadvisable, hurtful, detracting, destructive, deleterious, harm...