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- The third, or main wave, is the slowest and has travelled round the earth through the surface rocks. 第三种波,即主波,是最慢的,是围绕地球通过表面岩石传来的。
- On the basis of design of DDS utilizing FPGA, it presented a method of realizing the altitude modulation by generating the main wave and the modulation wave respectively, and the frequency modulation by changing frequency tuning word of main DDS. 在利用FPGA实现DDS的基础上,使用两路DDS分别产生主波形和调制波形,方便地实现两个任意波信号的幅度调制; 同时,通过调制波形数据实时控制主DDS的频率控制字,用数字的方法直接实现波形的各种频率调制。
- In this case,field potential amplitade of the harmonic which is the lower frequency of two reverse harmonics which are adjacent to main wave, is reduced by the "borrow slot "method, to suppress the vibration and noise sources of the unit. 定于绕组采用借槽方法,为了降低与生波相邻的两个反向波中次数较低的那次谐波的磁势幅值。 以达到消弱机组振动和噪声源的目的。
- The Celts may originally have come from eastern and central Europe, they came to Britain in three main waves: the first wave was the Gaels, the second was Britons and the third was Belgae. 凯尔特人最初来自于东欧及中欧,他们入侵英国分三次高潮:第一次是盖尔人;第二次是布立吞人;第三次是比利其人。
- The main impediment to growth is a lack of capital. 影响发展的主要障碍是缺乏资本。
- Crowds thronged the main square of the city. 城里的大广场上挤满了人群。
- The whole school (was) assembled in the main hall. 全校在大礼堂集合。
- The main feature on the program is her song. 那个节目的主要号召物是她的歌。
- Fables often have animals as the main characters. 寓言常以动物为主角。
- A heavy snowfall block the main road. 一次严重的降雪阻塞了主要公路。
- The gas main explode and set fire to the house. 煤气总管爆炸引起房子失火。
- I grasped the main point of the speech. 我领会了这篇演讲的要点。
- The country's main products are gold and cocoa. 这个国家的主要产品是可可和黄金。
- Men and machines poured along the main highways. 人和机动车顺着公路如潮涌而去。
- A main feature of computer virus. 计算机病毒的一种主要特性。
- He arranged his speech under four main heads. 他把发言内容归纳成四个主要方面。
- Sheet in the main sail, a storm in coming! 收回主帆,风暴要来了!
- In the main, the pupils did well on the test. 总的来说,学生们考得很好。
- Our main task now is increasing production. 我们现在的主要任务是增加生产。
- We have succeeded in our main objectives. 我们已经成功地达到了主要目标。