an optical illusion 视错觉 ; 光幻视
An Optical Indicator 一光指示器
an optical disk 光盘
an optical radar 光雷达
an optical square 直角转光器
an optical center 光心
an optical system 光学系统
an optical klystron 光学速调管
an optical
一个光学
以上为机器翻译结果，长、整句建议使用 人工翻译 。
A sensor channels the light signal along an optical fibre.
传感器沿光导纤维输送光信号。
《牛津词典》
youdao
An optical laser reads the transparency and creates a wobbly, out-of-tune, almost eerie-sounding keyboard effect.
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ENGADGET
It's got an optical drive, too, which we can't say of all the notebooks listed here.
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