leaden clouds promising rain
预示有雨的铅灰色的云.
that against the leaden sky now revealed more fully the wonderful beauty
映衬着铅灰色的天空，
The sky was steely, and all the trees so many black and sinister shapes.
天空呈铅灰色，所有树木都只是些阴森可怖的形状。
It had been a lenden dawn, and the rain now steadily renewed its fall.
这是一个铅灰色的黎明，现在雨又开始连绵不断地下了起来。
The sun lost its heartening power and the sky became grey and sombre.
太阳失去了它鼓舞人心的力量，天空变成铅灰色，阴沉沉的。
soft blue-gray mineral; lead sulfide; a major source of lead.
一种软质的兰灰色矿物，硫化铅，是铅的主要来源。
Experimental Study on the Treatment of Cd and Pb Polluted Soil by Lime and Fly Ash
石灰、粉煤灰处理铅镉污染土壤的试验研究
A dark gray mineral, Pb6Sb14S27.
辉锑铅矿一种深灰色矿物，Pb6Sb14S27
a steel gray metallic mineral (a sulphide of lead and antimony).
一种蓝灰色金属矿物（铅和锑的硫化物）。
Beginning from the characteristics of lead-bearing flue ash, thearticle systematically introduces the process flow and technology requirements of making use of lead-bearing flue ash to prepare lead monoxide.
从含铅烟道灰的特点出发，系统地介绍了处理含铅烟道灰，制备一氧化铅的工艺流程及技术条件。
A gray mineral, essentially PbS, the principal ore of lead.
方铅矿一种作为铅的主要矿石的灰色矿物，主要成分为
The treatment of wastewater containing lead with modified apatite was investigated.
对改性磷灰石处理含铅废水进行了研究.
The influence of ashing temperature and atomization temperature on determination of lead were discussed.
讨论了灰化温度、子化温度对测定铅的影响。
Analysis on the grey correlation of the world outstanding male shot technology and the movement results;
男子铅球技术与运动成绩的灰色关联分析
Gray Correlation Analysis of the Space-time of Technical Movements in Backward Sliding-step Shotput
背向滑步推铅球技术运动时空的灰色关联分①析
Robust Positioning Algorithm of Lead-Free Solder Joints Based on Gray-Level Integration Projection
无铅焊点鲁棒定位的灰度积分投影算法
Determination of Lead Content in Weichangjian Capsules by TPD Ashing Method
程序升温灰化法测定胃肠健胶囊中铅的含量
Geological characteristics and prospecting potentials of Qianshan wollastonite ores,Jiangxi province
江西省铅山地区硅灰石矿地质特征及找矿远景