单词	Allen screw
释义	Allen screwAllen screw /ˈælən skruː/ noun [countable] a type of screw with a hole that has six sides
随便看	attachment attaché attaché case attack attack ad attacker attagirl attain attainable attainment attempt Attenborough, Sir David Attenborough, Sir Richard attend attendance attendant attendee attender attention attention-deficit disorder attention-deficit hyperactivity disorder attention span attentive attentively attentiveness

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