而且, 这一目标或许要早于防止污染.Indeed, this strand may well predate the anti - pollution effort.在世界上大部分地区, 以重量表示价值的金属作为货币使用早于硬币.Metal, valued by weight, preceded coins in many parts of the world.测色学的基本概念早于1853年由格腊斯曼加以阐述.The basic con...
The general approach commonly adopted by most nutritionists is to measure the energy content.被大多数营养学家所普遍采用的一般方法是去测定能量含量.The energy content of fuels is directly related to the mass and not volume.与燃料的发热值直接有关的是质量而不是容积.Duri...
Derrick and I have been laying out the system of irrigating ditches.德里克跟我在一起修建那个灌溉网.He had been in command at the irrigating ditch the day before.上一天,在灌溉渠边,是他担任指挥的.The water in the irrigating ditch was well up.灌溉渠里涨满了水....