为了测出如此微小的力，国家标准和技术学会的团队将大约60个超冷铍离子装在一个叫做“潘宁陷阱”的装置中，该装置是利用磁场和电场禁锢带电粒子的。
To detect such a tiny force, the NIST team confined about 60 ultra-cold beryllium ions in a device called a Penning trap, which USES magnetic and electric fields to imprison charged particles.
几十年来，美国国家标准学会设计的ANSI法兰已经为石油和天然气工业提供了壹种适用的密封技术，而且卓有成效。
For decades, American national standards institute ANSI flange design has been for the oil and gas industry is provided one of the sealing technology, and effectiveness.
几十年来，美国国家标准学会设计的ANSI法兰已经为石油和天然气工业提供了一种适用的密封技术，而且卓有成效。
For decades, the American National Standards Institute ANSI flange design for the oil and gas industry provides a seal applied technology, and effective.
几十年来，美国国家标准学会设计的ANSI法兰已经为石油和天然气工业提供了一种适用的密封技术，而且卓有成效。
For decades, the American National Standards Institute ANSI flange design for the oil and gas industry provides a seal applied technology, and effective.
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