单词：piezoelectric loud-speaker
单词：piezoelectric loud-speaker 相关文章
最新研制一种新的医疗设备，可以利用身体动作来充电。 Novel materials could allow the implantation of flexible, rechargeable batteries that would constantly recharge from the body's own movements--even just breathing. Cynthia Gr
60秒科学
This is Scientific Americans 60 Science, Im Cynthia Graber. Thisll just take a minute. Batteries add weight, and they need recharging. Thats serious business for implanted medical devices. When the batteries die, patients sometimes have to undergo an
Scientific American(九)月
M.I.T. researchers have developed a piezoelectric fiber that would react to electric currents and have the potential to record or produce audio. Clothing is so yesterday. I mean, really, what can it do? It cant pick up sound, or beep at us if somethi
60秒科学
Templeton crouched under the straw at the bottom of the crate. 坦普尔顿蜷伏在板条箱底的麦草下面。 What a lot of nonsense! muttered the rat. 真是胡闹！老鼠嘟哝说， What a lot of fuss about nothing! 真是无事瞎忙乎！
夏洛的网
Wilbur blushed. 威尔伯脸红了。 He stood perfectly still and tried to look his best. 它站着完全一动不动，尽力做出最棒的样子。 This magnificent animal, continued the loud speaker, 这一只出色的猪，扩音器说下去，
夏洛的网
Unload your pig, please! said the loud speaker. 请把你的猪放下来！扩音器里说。 All together, now, boys! said Mr. Zuckerman. 大家一起来，上，伙计们！朱克曼先生说。 Several men stepped forward from the crowd to help li
夏洛的网