protractility

基本解释

• adj.伸出；突出

同根派生

英汉例句

• when the upper lip is connected to the snout by a frenum, the two are continuous and the upper jaw is restricted from being protractile;
  上嘴唇被一个系带连接到吻部，两者是连续的，而上颌则是被局限不能伸出的；
• protractile limbs and claws.
  可伸展的肢体和爪子