Sound waves, light waves, and radio waves have a certain frequency, or number of waves per second.Sound waves, light waves, and radio waves have a certain frequency, or number of waves per second.
声波、光波或无线电波等都有特定的频率，或者说是每秒的波数。
Sound waves, light waves, and radio waves have a certain frequency, or number of waves per second.Sound waves, light waves, and radio waves have a certain frequency, or number of waves per second.
声波、光波或无线电波等都有特定的频率，或者说是每秒的波数。
Sound waves, light waves, and radio waves have a certain frequency, or number of waves per second.Sound waves, light waves, and radio waves have a certain frequency, or number of waves per second.
地震带来的冲击波在德黑兰也能感觉到。
Only radio, near-infrared, and visible light waves can be studied within the earth's atmosphereOnly radio, near-infrared, and visible light waves can be studied within the earth's atmosphere
在地球的大气层以内，只能对射电波、近红外波和可见光波进行研究。
I like purple, purple is the shortest wavelength of visible light waves.I like purple, purple is the shortest wavelength of visible light waves.
我喜欢紫色，紫色是波长最短的可见光波。
Like light waves, acoustic ( sound) waves are characterized by a frequency, wavelength and propagatiLike light waves, acoustic ( sound) waves are characterized by a frequency, wavelength and propagati
声波就和光波一样，是以频率、波长和传播速度为其特徵。
Sound waves, light waves, and radio waves have a certain frequency, or number of waves per second.Sound waves, light waves, and radio waves have a certain frequency, or number of waves per second.
声波、光波或无线电波等都有特定的频率，或者说是每秒的波数。
physics specialized a device that makes light waves move in one directionphysics specialized a device that makes light waves move in one direction
（照相机和电子仪器的）偏光板（片、镜等） It\'s possible to create an outdoor-readable Tablet PC by using an appropriate LCD technology coupled with appropriate polarizers and filters. 使用合适的液晶技术加上合适的偏光片和滤光片，就可以制作出户外可读的平板电脑。
[ T ] to direct light waves, sound waves, etc. at a particular point:[ T ] to direct light waves, sound waves, etc. at a particular point:
focus something on something The human eye has a lens to focus light on the retina.
[ T usually + adv/prep ] to communicate something quickly, especially using radio or light waves:[ T usually + adv/prep ] to communicate something quickly, especially using radio or light waves:
Within moments of an event happening, the news can be flashed around the world.
