n.肋;缘;中脉;前缘脉;哥斯达黎加;
例句:
Today, Costa and his colleagues are taking on moral judgments.
如今,科斯塔和他的同事们开始研究道德判断问题。
I remember one time I was swimming in the ocean in Costa Rica.
记得一次,我在哥斯达黎加的海里游泳。
Costa Rica has an estimated population of 4 million.
哥斯达黎加约有4百万人口。