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op.ti.calH5Bp7tI7k[l, $5B:p-adj [not gradable]connected with the eyes or sight, or connected with or using light眼睛的，视觉的, 光学的an optical effect视觉效果an optical microscope/telescope光学显微镜/望远镜CDs are optical (= using light) storage media, unlike hard or floppy disks which are magnetic storage media.激光唱片是用光来存储的媒质，不像硬盘或软盘是靠磁性来存储的。In computing, optical character recognition (abbreviation OCR) is the process by which an electronic device recognizes written letters or numbers.光符识别An optical fibre is a long thin glass rod through which very large amounts of information can be sent in the form of light.光学纤维Many TV and telephone signals are now distributed through optical fibres.现在许多电视和电话信号是通过光学纤维散布出去的。 [FIBRE 中的fibre optic]An optical illusion is something that you think you see, but which is not really there.视错觉In the desert, the heat can sometimes cause people to see palm trees which aren't really there, but are just optical illusions.在沙漠里，炎热有时候能使人们看到非真实的而只是视错觉中的棕榈树。
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