In practice this is not the case since part of the sludge is not biodegradable.实际上不是这样,因为有一部分污泥不能为生物所降鲜.The rap oil - based lubricative additive is biodegradable and environment receivable lubricant.菜籽油基添加剂是一种可生物降解的环保的润滑...

n.雷达( radar的名词复数 )，雷达装置...

degradations的音标：...

反雷达...

v.（使）逐渐转化，顺次排列( gradate的现在分词 )...

degradable的音标：degradable的英式发音音标为：[dɪ'greɪdəbl]degradable的美式发音音标为：[dɪ'ɡredəbəl]...

Note the subtle gradation of / in colour in this painting.注意这幅画中色彩的细微变化.It is hard to understand all the minute gradation of their bureaucracy.很难弄清楚他们那套官僚体制全部细微的等级分别.The gradation in the physical properties of the alkane...