氧化还原反应在铁和锰的增溶和沉淀中具有重要作用.Oxidation - reduction reactions are important in the solubilization and precipitation of iron and manganese.有机物 、 褐铁矿和氧化锰的含量影响着成矿元素含量的变异.The contents of organic material, limonite and manganese hy...
Singing among the savage branches, it impale itself upon the longest, sharpest spine.它把自己钉在最尖最长的刺上,在蓁蓁树枝间婉啭啼鸣.Webster's longest lasting legacy is the changes he proposed in spelling.韦伯斯特最深远最持久的影响在于他提出的关于拼写方面的改变....B...
本的DFP-9500C已打浆机角, 踏板角度调整, 弹簧张力.The DFP - 9500 C has adjustments for beater angle, footboard angle, and spring tension.新打浆机感到一边, 并在其他硬塑料.The new beater is felt side, and hard plastic on the other....
The polytechnics have hitherto been at an unfair disadvantage in competing for pupils and money...到目前为止，理工专科学校在争取生源和资金方面一直处于劣势。The ratio of pupils to teachers was 30 to 1.学生和老师的比率是30比1。The pupils are all looking at the c...
Children expend a lot of energy and may need more high-energy food than adults.孩子们消耗很多能量，可能比成年人需要更多高能量的食物。If you give up exercise, your muscles shrink and fat increases. By the same token, if you expend more energy you w...