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- How much does sound travel faster in water than in air? 声音在水中比在空气中传播快多少？
- The speed of sound in water is about four as great as in air. 声音在水中的速度是空气中的四倍左右
- Secondary Surveillance radar (SSR) is a key equipment in Air Traffic Control (ATC) and military Identification Friend or Foe (IFF). Since very high reliability and stability is required in these two areas, SSR is a hot issue in Radar signal processing. 二次雷达(Secondary Surveillance Radar)是民航空中管制(Air Traffic Control)和军事敌我识别(Identification Friend or Foe)系统中的关键部分,由于这两个应用领域都要求很高的可靠性和稳定性,因此,二次雷达一直是国内外雷达信号处理领域的研究热点。
- He sucked in air, then went under the water again. 他深深吸了一口气又潜到水里。
- Sound travels better in water than in air. 声音在水中比在空气中传播得快。
- Sound travels at 1, 100 feet per second in air. 声音在空气中的传播速度为每秒钟1,100英尺。
- Designed to operate on land, water, or in air. 长于陆海空作战的，三栖的可在陆上、水上或空中操作的
- SHANGHAI ZHIYIN SOUND EQUIPMENT CO., LTD. 上海知音音响器材有限公司。
- Guangzhou Hengxin Sound Equipment Co. 广州恒欣音响器材商行。
- Shanghai Nissei Sound Equipment Co., Ltd. 上海日生音响设备有限公司。
- Exhaust gas has been incriminated in air pollution in cities. 废气已过视为城市空气污染的原因。
- Service equipment in existing accounts. 为现有的客户提供技术服务。
- The velocity of sound in water is more than four times that in air. 声音在水中的速度是在空气中的速度的4倍多。
- Call up the equipment in change mode. 在修改方式下,调用设备主记录。
- She crawled onto the river bank and lay there gulping in air. 她爬上河岸,躺在那里喘着大气。
- The list of the equipment in duplicate. 设备清单一式二份。
- How much does sound travel faster in water than in air ? 声音在水中比在空气中传播快多少?
- The camper had cooking equipment in his pack. 那露营者的背包里有烹饪装备。
- They packed the food and camping equipment in the trailer. 他们把食物和野营用具都装上拖车上了。
- In water sound travels nearly five times as fast as in air. 声音在水中的传播速度几乎是在空气中传播速度的五倍。
