be on duty by turns是什么意思？

• fake
• supper
• disappointed
• crayon
• 权限英文
• pear
• various
• failure
• intermission
• PEGGING
• 呼吁英语
• 长颈鹿英语怎么说
• cheese
• algiers
• general
• 分配英文
• toxicity
• general
• neck
• explore
• 方案英语
• cloud
• searches
• 造型的英文
• mind
• lycopene
• reveal
• vehicle
• giraffe
• autumn

• satisfaction
• text
• predict
• firmness
• 流浪者英文
• 参与者英文
• juice
• erased
• ultra
• giraffe
• 来源英语
• permitted
• 参数英文
• tourist
• tomato
• 局外人英文
• maths
• profile
• panicked
• emergency
• passage
• 解决方案英文
• banger
• droplets
• bombarded
• lake
• fiercely
• 缺陷英文
• searches
• front

• grass writing
• proficiently
• oral speech sounds
• counterfeit article
• pouring box
• person in charge
• ice chisel
• rube
• phase advancer
• taster
• priapus
• or more columns
• more authoritarian
• berculon B
• electricize
• bacillary phthisis
• a layman
• floating plate
• by chemical means
• outstanding person
• narrow scrutiny
• ask for a loan
• Make it weaker