单词	black swan
释义	black swanˌblack ˈswan (also ˌblack ˈswan eˌvent) noun [countable] an event that no one expects and that has a very great effect
随便看	knackered knackers' yard knapsack knave knavery knavish knavishly knead knee knee breeches knee cap kneecap knee-deep knee-high knee-jerk kneejerk kneel knee-length knees-up knell knelt Knesset knew knickerbockers knickers

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