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- optical sound film projector 光学还音放映机
- optical sound film 光声胶片
- Sound Gate: The gate used in an optical sound head, instead of a sound drum, to keep the film sound track precisely aligned on the scanning beam slit during sound reproduction. 声门：光学声音头上用的片门，代替声鼓，使得胶片的声轨在声音重现过程中正好和扫描狭缝光束精确地排列成一直线。
- The sound film seasonable and lived along with the technical development and audience's need. 有声电影随着技术的发展和观众的需要应时而生了。
- This payment until 20 years specializing in the production of speaker accessories - Shielded, vibration plate, the sound film, ASSY experience. 讫今为止已有20年专业生产扬声器配件--防尘盖、振动板、音膜、ASSY的经验。
- In 2000 to open branch in China, Huizhou is the dust cover, vibration plate, the sound film, ASSY set the development, production, sales. 于2000年在中国惠州开设分厂，是防尘盖、振动板、音膜、ASSY集开发、生产、销售为一体。
- Sound Head: The optical sound reproducer mounted beneath the projector head but above the take-up reel support arm or magazine. 声头、音头：安装在放映机头下、卷轴支撑臂或片匣上面的光学声音重现装置。
- Projection Speed: The rate at which the film moves through the projector; twenty-four frames per second is the standard for all sound films. 放映速度：电影胶片通过放映机的速度；有声影片的标准速度为每秒24格影像。
- Some ahd ugly voices and others just couldn't act in the more natural sound films! 有些人嗓音太糟，另一些人在更为自然的有声电影中就是不会演戏!
- Oscar receipt Ray Feeney says Hollywood is undergoing a change as a * the shape from silent to sound films, or from black and white to color. 只是还是学不会装腔作势。我要满足你的所有高尚。不需要布阵。从小在一起，很多很多年的不相见。
- Oscar recipient Ray Feeney says Hollywood is undergoing a change as profound as the shift from silent to sound films, or from black-and-white to color. 只是还是学不会装腔作势。我要满足你的所有高尚。不需要布阵。从小在一起，很多很多年的不相见。
- variable-hue optical sound recording 变色光学录声
- mechanical optical sound recording 机械光学录音
- variable-area optical sound recording 变积式光学录音
- His optic nerve was hurt in an accident. 他的视神经在一次事故中受到损伤。
- Microscopes and telescopes are optical instruments. 望远镜和显微镜是光学仪器。
- The optic theory originated with Einstein. 光学理论是爱因斯坦首创的。
- A mirage is an optical illusion. 海市蜃楼是一种视错觉。
- A system of optical components that magnifies. 能起放大作用的一组光学元件
- Showing no optical activity in polarized light. 无旋光的极化光下无光学反应的
