若是不能及時(shí)把積雪從道路上清理走, 就會(huì)被壓實(shí),給車輛行駛帶來(lái)困難.If the snow isn't cleared from the roads quickly, it packs down hard and makes driving difficult.水道內(nèi)由不可壓實(shí)的砂或砂礫物質(zhì)充填.The channel is filled with noncompactible sand, or with sand and g...