Can not be certain or doubtful是什么意思？

• cloud
• bothering
• neck
• vehicle
• general
• mind
• conflict
• 分配英文
• organizations
• approaches
• passage
• 局外人英文
• silver
• 来源英语
• 参数英文
• begins
• cheese
• explore
• 造型的英文
• monitor
• client
• volume
• candy
• disappointed
• bombarded
• BARRIE
• text
• firmness
• general
• failure

• sweater
• lake
• reveal
• 参与者英文
• polite
• 确认英文
• 旋律的英文
• PEGGING
• scared
• 队长的英文
• tourist
• giraffe
• searches
• erased
• 流浪者英文
• toxicity
• autumn
• aspect
• lesson
• 导师英文
• algiers
• supper
• various
• 呼吁英语
• 实施英文
• narrow
• 权限英文
• panicked
• tomato
• front

• Glyn
• Goode
• Primakov
• poisoned
• cliffs
• chalks
• insists
• Saumur
• responsibilities
• schoolchildren
• challenged
• daughters
• contesting
• Signor
• Amato
• passionately
• championed
• chanced
• grades
• snatching
• Gerhard
• prospered
• Kreisky
• architects
• abstaining
• climates
• criticizes
• nappy
• Greenock
• swerved