eccentric pencil偏心: partiality; bias光束: light beam a surname偏心光波导: eccentric core optical wave guide偏心光线束: eccentric pencil of rays偏心光栅: eccentric grating下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:偏心光束,即可在微信中查询翻译