您要查找的是不是：
- No potassium did we find in this mineral. 在这种矿石中我们没有发现钾。
- Potassium is necessary to the existence of all living things. 钾是所有生物生存必须的。
- The hydro craft floated over the water. 水翼艇在水面漂流。
- Soon after, Norsk Hydro said it was bowing out. 不久，海德鲁就宣布退出。
- The acyl chloride product was fluorinated by potassium fluoride and esterified by methanol to synthesize dimethyl tetrafluoroterephthalate. 以氟化钾为氟化剂,环丁砜为溶剂置换氟化,再与甲醇酯化得到四氟对苯二甲酸甲酯;
- Does fluoride help prevent cavities? 氟可以防止蛀牙吗?
- Lab Experiment on Harm of Fluoride on Rubber Trees. 大气氟化物对橡胶树的伤害实验研究。
- Dried Aluminium Fluoride Producing Facility. 干法氟化铝生产装置建设。
- The components of a potassium cycle vary greatly. 钾素循环的各个环节有很大的变化。
- Study on Polyvinylidene Fluoride Coating. 聚偏氟乙烯涂料的研究。
- PH is 6.5 to 8, no sulfur or fluorid. PH值为6.;5到8之间，不含硫、氟化物。
- Fluoride has many effects on cell mem brane . 氟对细胞膜有多方面的影响。
- RECENT DEVELOPMENT OF POTASSIUM CARBONATE INDUSTRY. 碳酸钾工业发展近况。
- In this case, the ion is potassium. 这里的离子指的是钾离子。
- HIGHLY IONIZED POTASSIUM AND CALCIUM SPECTRA. 高度游离钾及钙之光谱(英文)
- Potassium One of the essential elements in plants. 钾：植物体的必需元素之一。
- The hydro power station stands at the junction of two rivers. 水力发电站在两条河流的汇合处。
- What fruit vegetable contains potassium most? 什么水果蔬菜含钾最多？
- This paper reports the synthesis of 2-heptanone in the functions of absolute potassium fluoride and acetonitrile. 报道了在无水氟化钾和乙腈作用下2－庚酮的合成。
- The hydro - electric power stations were started last year. 这些水电站是去年办起来的。
