那猫伸直了腰跳下墙头。The cat uncurled itself and jumped off the wall.跳水时腿要伸直.When you dive, you must keep your legs straight.他伸直身子躺在海滩上.He stretched himself out on the beach....

“伸直”的反义词：蜷缩, 弯曲。...

“伸直”的英语可以翻译为：unbend，unwind ...