电信专业英英词典O-1
OA&M
operation administration & maintenance
OCC
other common carriers
Ohms Restriction 1
Ohms Restriction is the same as Ohms resistance. Ohms are measures of resistance. A resistance of one Ohm allows one Ampere 2 of current to pass at the electric potential of one Volt 3.
Open Systems Interconnection (OSI) standards
OSI standards are standards for the exchange of information among systems that are "open" to one another by virtue 4 of incorporating ISO standards. The OSI reference model segments communications functions into seven layers. Each layer relies on the next lower layer to provide more primitive 5 functions and, in turn, provides services to support the next higher layer.
Operating Telephone Company
An operating telephone company is any Bell-operating company or independent telephone company (termed exchange carrier in the MFJ) operating in North America.
Optical fibers 7 are light guides for electromagnetic waves in the infrared 8 and visible light spectrum 9 composed of concentric cylinders 10 made of dielectric materials with different indices of refraction (i.e., velocity 11 of propagation normalized to the velocity of light in free space). At the center is a core comprising the glass or plastic strand 12 or fiber in which a light wave travels. A low index of refraction clad surrounds the core and is itself enclosed in a light-absorbing jacket that prevents interference among multi-fiber cables. Multi-fiber cable can be purchased with between 2 and 136 fibers.
OPX
off-premises extension
OSC
operating system control
OSI
open systems interconnection
OSS
operations support systems or operational support system
Out Of Band Signaling
Out of band signaling uses the same channel path as the voice traffic but signaling is in a frequency band outside that used for the voice traffic. In digital systems, out-of-band signaling may take the appearance of an allocated 13 bit position or a dedicated 14 channel or time slot.
- The park is open to the public without restriction.这个公园对公众开放，没有任何限制。
- The 30 mph speed restriction applies in all built-up areas.每小时限速30英里适用于所有建筑物聚集区。
- This piece of equipment needs a thirty-ampere fuse.这设备需要30安培的熔丝。
- The units in which we show voltage and current are volt and ampere respectively.我们用以表示电压和电流的单位分别为伏特和安培。
- You may use 100 and 110 volt appliances in your room.您可以在房间使用100及110伏特的电器。
- The common service voltage of electric power in our country is 220/380 volt.我国普通供电电压为220/380伏。
- He was considered to be a paragon of virtue.他被认为是品德尽善尽美的典范。
- You need to decorate your mind with virtue.你应该用德行美化心灵。
- It is a primitive instinct to flee a place of danger.逃离危险的地方是一种原始本能。
- His book describes the march of the civilization of a primitive society.他的著作描述了一个原始社会的开化过程。
- The basic structural unit of yarn is the fiber.纤维是纱的基本结构单元。
- The material must be free of fiber clumps.这种材料必须无纤维块。
- Thesolution of collagen-PVA was wet spined with the sodium sulfate as coagulant and collagen-PVA composite fibers were prepared. 在此基础上，以硫酸钠为凝固剂，对胶原-PVA共混溶液进行湿法纺丝，制备了胶原-PVA复合纤维。
- Sympathetic fibers are distributed to all regions of the heart. 交感神经纤维分布于心脏的所有部分。
- Infrared is widely used in industry and medical science.红外线广泛应用于工业和医学科学。
- Infrared radiation has wavelengths longer than those of visible light.红外辐射的波长比可见光的波长长。
- This is a kind of atomic spectrum.这是一种原子光谱。
- We have known much of the constitution of the solar spectrum.关于太阳光谱的构成，我们已了解不少。
- They are working on all cylinders to get the job finished. 他们正在竭尽全力争取把这工作干完。 来自《简明英汉词典》
- That jeep has four cylinders. 那辆吉普车有4个汽缸。 来自《简明英汉词典》
- Einstein's theory links energy with mass and velocity of light.爱因斯坦的理论把能量同质量和光速联系起来。
- The velocity of light is about 300000 kilometres per second.光速约为每秒300000公里。
- She tucked a loose strand of hair behind her ears.她把一缕散发夹到了耳后。
- The climbers had been stranded by a storm.登山者被暴风雨困住了。