1. After undergoing the stress of tough competition, school athletes grew in strength and endurance. 在经历了激烈竞争的压力之后，学校运动员在力量和耐力方面都有所提高。
2. Hawaiian culture is not a relic of the past; it is a living culture undergoing a renaissance today. 夏威夷文化不是历史的遗迹；它是一种如今正在经历复兴的鲜活文化。
3. Nicknamed the Southern Pinwheel, M83 is undergoing more rapid star formation than our own Milky Way galaxy, especially in its nucleus. 绰号“南方风车”的M83正在经历比我们银河系更快的恒星形成过程，特别是在它的核心。
4. Theme parks are undergoing other changes, too, as they try to present more serious social and cultural issues, and move away from fantasy. 主题公园也在经历着其他的变化，因为它们试图呈现更严肃的社会和文化问题，远离幻想。
5. The new drug is undergoing clinical trials. 这种新药正在进行临床试验。
