求翻译：This made Rosa happier, but she was still afraid her classmates were making fun of her behind her back. One day , all this changed when Mr Ransom, the coach from the youth club , asked Rosa to play center on their basketball team. He said that Rosa was a good ball player and her height would make her valuable as center是什么意思？

待解决 悬赏分：1 - 离问题结束还有