您要查找的是不是：
- A display device that uses a cathode ray tube. 一种使用阴极射线管的显示装置。
- The office has been humming with activity. 办公室一直忙着搞活动。
- An electron tube having a cathode and an anode. 电子二极管有一个阳极和一个阴极的电子管
- The threat of war has depressed business activity. 战争的威胁使经济萧条。
- There has been a lot of activity in the town today. 今天市中心相当热闹。
- The town was humming with activity. 该市镇生气勃勃，呈现一片热闹的景象。
- Process of hard Cr plating on electroless Ni coatings was investigated. Results showed heat treatment and cathodic activation before plating are key technical points. 研究了化学镀镍层上镀硬铬工艺。试验结果表明镀前热处理和阴极活化是其技术关键。
- Hydrogen storage alloy, as the cathodal active substance, is the key material deciding the performance of Ni-MH chemical battery and it will have a broader development prospect. 贮氢合金作为镍氢电池负极活性物质，是决定镍氢电池性能的关键材料，具有广阔的发展前景。
- Stamp collecting is my favorite activity. 集邮是我最喜爱的消遣。
- The store was a scene of great activity. 这家商店顾客盈门。
- He once engaged in anti-government activity. 他一度从事反政府的活动。
- The office is humming with activity. 办公室里一片忙碌。
- German physicist. He won a1905 Nobel Prize for his work on cathode rays. 勒纳，菲利普1862－1947德国物理学家。因在阴极射线方面的成果而荣获1905年诺贝尔奖
- A center of interest or activity. 中心兴趣或活动的中心
- Showing no optical activity in polarized light. 无旋光的极化光下无光学反应的
- NTC materials were prepared from cathodic active substance of spent lithium-ion batteries. The optimum technological conditions of preparing precursor were investigated through the orthogonal experiments. 本实验以废旧锂离子电池正极活性物质为前驱体,制备以MnCo_2O_4为主晶相的NTC热敏材料。
- Color cathode ray tube shielded band. 彩色显像管用带钢。
- An increase, as in movement or business activity. 进步，改进，改善运动或商业活动的进步或兴隆
- Indulgence in or pursuit of sexual activity. 纵欲; 追求肉欲对性行为的放纵或追求
- The phenomena associated with volcanic activity. 火山现象与火山活动有关的现象
