pin down是什么意思？

• silver
• searches
• 流浪者英文
• fake
• 缺陷英文
• cloud
• 分配英文
• 方案英语
• narrow
• 抛弃英文
• tomato
• candy
• permitted
• passage
• text
• crayon
• mind
• erased
• polite
• algiers
• 造型的英文
• repeat
• droplets
• tourist
• lesson
• prompt
• PEGGING
• 解决方案英文
• giraffe
• approaches

• bombarded
• committing
• intermission
• predict
• saturday
• 队长的英文
• 权限英文
• begins
• bothering
• 呼吁英语
• 参与者英文
• monitor
• giraffe
• reveal
• profile
• 局外人英文
• juice
• emergency
• brat
• cheese
• autumn
• banger
• 确认英文
• default
• client
• maths
• ticket
• firmness
• dragon
• neck

• film strip
• syndetic
• suscitate
• ovoid
• Sell to
• chromatic colour
• be perfunctory
• aristolochiae lignum
• fraternal love
• US Senate
• cameracature
• palm grease
• treat unobligingly
• Roman Catholicism
• reduce a price
• algometry
• photometer
• an autograph book
• vindicator
• direct short
• hehminthic
• Windproof mirror
• try to be preeminent
• pass check