回答：
To express the idea of "出国留学" in English, we can use the term "study abroad". This phrase denotes the act of pursuing educational opportunities in a foreign country. It involves traveling to another nation and enrolling in an academic program there, typically at a university or college. Studying abroad provides international students with a unique chance to immerse themselves in a different culture, learn a new language, and gain a global perspective. This experience can greatly enhance one's personal growth and broaden their academic horizons. Overall, "study abroad" is a widely recognized term in English that encompasses the idea of pursuing education beyond one's home country boundaries, which is highly valued amongst students seeking international exposure and a transformative educational experience.