For controlling source pollution from the sources, sloping land management in the headwater regions is necessary.为了从源头上控制农业面源污染,必须根据土壤生物热力学原理,以土壤为中心, 大力治理坡地.In arid climates, surface water is generally better than water ...
She had sat there twiddling nervously with the clasp of her handbag.她坐在那里紧张地摆弄着手提包的扣钩。I'm just going to be hanging around twiddling my thumbs...我只会闲呆着，什么事也不做。I had to sit at home twiddling my thumbs, waiting for the...
这钢的韧度正合适.The temper of the steel is right.采用钢的连续浇铸法很重要.Of great importance is the introduction of continuous steel pouring.钢的硬度比铝高.The temper of steel is higher than that of aluminium....
我得在船上备足干粮。I had to stock the boat up with food.他负担不起去澳大利亚的船费, 因此,他在船上做工以抵偿船费.He couldn't afford the fare to Australia, so he worked his passage.你们在船上有舱位了 吗 ?Have you got your berths on the ship yet?...