[化] 有效中心; 活性中心

active center的用法和样例：

例句

The production of polymer in each case involves the rapid addition of monomer to a few active centres.在各种情况下聚合物的生成都是单体对少数几个活性中心的快速加成。
You need your student ID to get into the student recreation center.你要有学生证才能进入学生活动中心。
The first one is the construction of the Oberlin Student Center.其一，建构奥柏林学生活动中心。

电信类英语词汇表大全-19

中文英文缩写部件 part 部件装配 part assembling 财政年度 fiscal year FY 采集系统 acquisition system 采样值 sampling value 彩色喷墨打印机 color ink-jet printer 彩色视频

发表于:2019-01-03 / 阅读(33) / 评论(0)

电信英语

VOA标准英语2011--Virtual Center Keeps Seniors on Their Toes

Virtual Center Keeps Seniors on Their Toes In a small community in Virginia, elderly residents have developed a program that helps them stay active and involved, without having a huge impact on the local government budget. Edna Ludden, 71, attends on

发表于:2019-01-13 / 阅读(36) / 评论(0)

VOA标准英语2011年(十一月)

365个英语简短小故事-234. Getting Older

All seniors 55 and older are invited to a special meeting next Tuesday in the Senior Center. The meeting will begin with cookies and lemonade. The speaker will be James Carter, the director of a nonprofit organization dedicated to making the golden y

发表于:2019-01-20 / 阅读(44) / 评论(0)

365个英语简短小故事

NATO chief calls for more active dialogue with China

LONDON, July 4 (Xinhua) -- Anders Fogh Rasmussen, Secretary General of the North Atlantic Treaty Organization (NATO) expressed his hope on Wednesday that NATO would seek a more active dialogue with China. We must expand the range of nations with whom

发表于:2019-01-30 / 阅读(108) / 评论(0)

英语新闻

Samsung, suspends development, active shutter 3D TVs

SEOUL, Nov. 8 (Xinhua) -- Samsung Electronics, the world's largest flat screen TV vendor, said Tuesday that it has suspended its plan to develop active shutter three-dimensional (3D) TVs with RealD, the U.S.-based 3D technology supplier. Samsung has

发表于:2019-01-30 / 阅读(73) / 评论(0)

英语新闻

CCTV9英语新闻：Exclusive: IFEZ a logistics and transportation center

Our reporter Su Yuting sat down with the mayor of Incheon City, Yoo Jeong-bok, and asked him about a Free Economic Zone in Incheon, as well as what he expected from the governor's forum. Su: How can China benefit from the Incheon Free Economic Zone?

发表于:2019-02-18 / 阅读(57) / 评论(0)

cctv9英语新闻2016年

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