1.The baby's legs flailed under the quilt.

1.小孩的两条小腿在被乱动。

2.I was flailing about in the water.

2.我在水中徒劳地四挣扎。

3.The prisoner’s limbs flailed violently because of the pain.

3.那囚犯因为疼痛,四肢剧烈地抖动。

4.He became moody and unreasonable, flailing out at Katherine at the slightest excuse.

4.他变得喜怒无常、不可理喻，为点鸡毛蒜皮的小事就殴打凯瑟琳。

5.To observate clinical effect about treatment of flail chest by multiporous lucite plate external fixation device.

5.观有机玻璃板外固定器治疗连枷胸的临床效果。