waste product

useless by-product of a physical or industrial process 排泄物; （生产中的）无用的副产品.

washing-powder, washing-soda, washing-up, Washington, Washington D.C., washroom, washtub, washwoman, washy, wasn't, wasp, WASP (also Wasp), wasp-waisted, waspish, waspishly, waspishness, wassail, wastage, waste, waste on, waste-basket (also `waste-bin), waste-paper, waste-pipe, wasteful, wastefully, wastefulness, wasteland, waster, wastrel, watch, watch out for, watch over, watch-dog, watch-night service, watch-strap (Brit) (US `watch-band), watch-tower, watchdog, watcher, watchful, watchfully,