entail strenuous effort是什么意思？

• pear
• 参数英文
• 来源英语
• 方案英语
• emergency
• amazing
• various
• 领域英语
• scared
• polite
• lake
• cloud
• firmness
• front
• passage
• mind
• neck
• bothering
• rice
• tourist
• giraffe
• algiers
• candy
• default
• fiercely
• saturday
• tomato
• peeping
• crayon
• 确认英文

• searches
• 分配英文
• permitted
• fake
• committing
• 局外人英文
• 抛弃英文
• autumn
• lycopene
• organizations
• repeat
• narrow
• client
• reveal
• maths
• lesson
• 实施英文
• vehicle
• profile
• 呼吁英语
• ticket
• passage
• satisfaction
• approaches
• 导师英文
• toxicity
• text
• silver
• conflict
• supper

• vulcanize
• Deep in
• camp stove
• call back pay
• meristic
• The weight is
• Weatherbee
• mesiad
• woodcocks
• mycoplasmas
• folinic acid
• sepium
• arsenic flowers
• saw off
• derive from
• whereafter
• consumption goods
• away from
• heavy burden
• Back lining
• relearns
• sootiness
• Wheels car
• isgood