Epicycloidal
圆外旋轮线的
🗣️ 情景例句
What are your goals?
你有什么目标？
We hope they will improve the environment.
我们希望他们把环境改善得更好。
and these will ply the short wings with such irresistible power that they can bore for long distances through an opposing gale before exhaustion follows.
这些肌肉以巨大的力量扇动短小的翅膀，使这类鸟能顶着大风飞行很远的路才会疲劳。