Roads, railways, water and gas mains, sewage pipes and electricity cables all move things around. So do the blood vessels of animals and the sap-carrying xylem and phloem of plants.
他的观点是，在某种程度上二者均由运输物质的网络构成——公路，铁路，水路以及煤气管，污水管还有电缆线都在输送物质，动物血管和植物运输汁液的木质部、韧皮部也是如此。
Besides serving as carriageways for vehicles and pedestrians, roads also accommodate various utility services, such as water and gas mains, sewers and electricity and telephone cables.
本港的公路除供车辆和行人使用外，也敷设了各种公用设施，如。
Una: so that means this area is without mains water electricity gas and sewage disposal.
巫娜：那是说，整个地区没有总管输送的水、气和污水处理。
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