Ericsson grew up in Sweden, and studied nuclear engineering until he realized he would have more opportunity to conduct his own research if he switched to psychology.
【楠楠自语】
句子的主干为：Ericsson grew up in Sweden, and
studied nuclear engineering，until引导的为时间状语从句表示“直到”，在时间状语从句中包含了一个if引导的条件状语从句。
【参考译文】
埃里克森在瑞典长大，学习核工程，直到（后来）他意识到如果他转向心理学，会获得更多进行独立研究的机会。
