crawl ·noun (SWIMMING)
Definition: a style of swimming in which you move your arms over your head and kick with straight legs Level: C1
在竞技游泳中，自由泳（爬泳）通常是最快的泳姿。
In competitive swimming, the front ___crawl is often the fastest stroke.
她已经掌握了蛙泳和自由泳，但在仰泳上仍有困难。
She has mastered both breaststroke and ___crawl, but still struggles with backstroke.
要完善你的自由泳，你需要协调手臂动作和稳定的腿部踢水。
To perfect your ___crawl, you need to coordinate your arm movements with a steady leg kick.