1. The baby''s legs flailed under the quilt.
    小孩的两条小腿在被子下面乱动。

1. (链枷)：农民的发明:链枷(Flail) 很多时候,链枷和链锤都被混淆了. 其实链枷本是农民打麦的东西,很象中国的双节棍,但是要大得多. 一旦被打到一下,哪怕穿链子甲都有骨折的危险. ?链枷的兄弟:链锤(Spiked Flail) 战场上链枷的杀伤力就小了点了......不过没关系,

2. flail在线翻译

2. 得不稳,要掉下来了：Fixed pro 以前留下的膨胀栓、岩钉、铁环等保护装置. | Flail 得不稳,要掉下来了 | Flake 岩石页片.

3. 打(谷子)：kennel 狗窝 | flail 打(谷子) | frail 脆弱的

1. (四肢)拼命乱动,使劲乱摆
    If your arms or legs flail or if you flail them about, they wave about in an energetic but uncontrolled way.

    e.g. His arms were flailing in all directions...
           他的手臂胡乱挥舞着。
    e.g. He gave a choked cry, flailed his arms wildly for a moment, and then went over the edge.
           他闷哼了一声，手臂乱挥了几下，就从边上摔了下去。

2. 连枷(脱粒用的农具)
    A flail is a tool which consists of a piece of wood or metal that can swing freely from a handle. Flails are used to beat crops such as corn in order to separate the grain from the rest of the plant.

相关词组：flail around

1. an implement consisting of handle with a free swinging stick at the end
    used in manual threshing

1. give a thrashing to
    beat hard

    Synonym: thrashthreshlam

2. move like a flail
    thresh about

    e.g. Her arms were flailing

    Synonym: thresh