Medullas
n. 髓, 髓鞘, 髓质
🗣️ 情景例句
OK, Jane. Start the music.
好 ，Jane。音乐开始。
A man without money is a bow without an arrow.
人无钱，犹如弓无箭。
Then the Class 2 runner dropped his stick on the ground when he was passing it on to the fourth runner.
忽然2班的运动员在传棒给第四个运动员时，把棒弄掉到了地上。