单词	单数核
释义	同半数核--单数核
随便看	optical trapping optical tube length optical tunable filters optical tuning optical tunnel optical turbulence optical tweezers optical twinning optical type font (optical) uniaxial crystal optical uniaxial crystal optical uniformity optical unit optical up-conversion optical user network interface optical utilization factor optical variable optical variable ink optical variables control optical variables measurement optical velocimeters optical velocity measurements optical vernier optical vestigial side-band modulation optical vibration