A mutated “biotype B” insect emerged in Napa Valley in 1980 and did an estimated $6 billion of damage before wide-scale uprooting, burning and replanting was completed in 1995.
1980年,加州纳帕谷出现了一种基因突变的“同型小种B型”蚜虫。 这种蚜虫造成了估计60亿美元的损失,随后葡萄园开始了大规模连根拔除,烧毁并重新栽种于1995年完成。
Advanced technologies like digital mobile communications, SDH, dense WDM, etc. have found wide application and high and new technologies like B-ISDN and ATM are on trial over the network.
先进的数字移动通信技术、sdh光通信系统技术、密集波分复用技术得到广泛采用,宽带综合业务数字网、at m宽带交换系统等高新技术正在网上试验。
The article introduces came magnetic hardening Nd-Fe-B powder in uniform property and coherence magnets performance, shape technique and wide applications in brushless motors.
文中介绍各向同性快淬钕铁硼粉及制成的粘结磁体的性能,成型工艺,并指出各向同性粉结钕铁硼磁体在无刷电机中的广泛应用。
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