Ysa
abbr. Young Socialist Alliance <美國(guó)>社會(huì)主義青年聯(lián)盟; Youth Service America 美國(guó)青年服務(wù)社; Youth Services Administration (District of Columbia) 青年服務(wù)部（哥倫比亞特區(qū)）
??? 情景例句
It's inevitable that he'll find out about it.
他無可避免地會(huì)發(fā)覺此事。
When is the most convenient time for you?
你在什么時(shí)間最方便呢？
She's sitting under the tree.
她正在樹蔭下坐著。