optical source是什么意思？

• bothering
• amazing
• volume
• lesson
• 分配英文
• peeping
• searches
• algiers
• tomato
• 造型的英文
• 队长的英文
• lycopene
• predict
• 领域英语
• approaches
• searches
• panicked
• 方案英语
• droplets
• bombarded
• committing
• modernize
• profile
• general
• narrow
• intermission
• silver
• erased
• giraffe
• pear

• passage
• candy
• default
• 参数英文
• 抛弃英文
• failure
• giraffe
• 导师英文
• rice
• polite
• front
• scared
• general
• crayon
• 纪念品英语
• ultra
• aspect
• permitted
• lake
• 流浪者英文
• maths
• BARRIE
• reveal
• neck
• various
• emergency
• cheese
• brat
• disappointed
• autumn

• make a pledge
• whale fishery
• supermaxilla
• scruff of neck
• zymolysis
• rampancy
• set foot in
• californianus
• fictitious person
• puritano
• Click sound
• whichmeant
• trammelled
• thorniness
• pharmaceutic
• antenniferous
• stomach convulsion
• pin connection
• hand wheel
• Conceive of
• timekeepers
• Bend crutches
• behonest
• fouder
• superfemale
• carefull