At that second a trolley came hurtling by, heading downtown, its bell clanging loud.就在此刻,一辆开往闹市的电车风驰电掣而来, 铃声震耳.He wheeled the trolley down the corridor and disappeared with it into the service lift.他推着小推车走过走廊，之后进了员工专用电梯不...
Oxidized wax modified by amidation reaction to produce acylamide with better physical and chemical properties.氧化蜡经过胺改性可以得到具有更佳物化性能的脂肪酸酰胺.A new leather fatliquor product was synthesized by amidation, esterification and ne...
蟒主要吃鸟和小的哺乳动物.The boa feeds on birds and small mammals.绿色的南美洲水蟒也有相同的捕食工具.For the green anaconda, the hunting tools are the same.背部有斑驳的图案的澳大利亚蟒.Australian python with a variegated pattern on its back....