difficult to manage or operate是什么意思？

• disappointed
• tourist
• 参数英文
• brat
• giraffe
• banger
• ticket
• committing
• reveal
• crayon
• supper
• 队长的英文
• 权限英文
• lycopene
• firmness
• autumn
• bothering
• tomato
• cheese
• fiercely
• fake
• 方案英语
• peeping
• monitor
• passage
• 抛弃英文
• 导师英文
• chess翻译
• sweater
• PEGGING

• searches
• giraffe
• mind
• 呼吁英语
• failure
• theatre
• general
• satisfaction
• algiers
• narrow
• organizations
• toxicity
• lake
• 造型的英文
• droplets
• general
• various
• saturday
• erased
• prompt
• 纪念品英语
• permitted
• repeat
• 局外人英文
• 流浪者英文
• searches
• default
• modernize
• scared
• cloud

• ketoketene
• ketol
• ketolase
• ketolysis
• ketomycin
• ketomyoinositol
• ketonaldehydmutase
• ketone
• ketonemia
• ketonization
• ketonize
• ketonuria
• ketopalmitate
• ketoplasia
• ketoprostenoate
• ketoreductase
• ketos
• ketose
• ketoses
• ketoside
• ketosis
• ketostearate
• ketosteroid
• ketosubstrate
• ketosuria
• ketotetrose
• ketothiolase
• ketotifen
• ketotriose
• ketovinylation