法律的概念涉及主要规则和次要规则的结合。
The concept of law involves the union of primary and secondary rules.
你男朋友那么紧张是因为我。
The development of MRI has revolutionized the field of medical imaging, allowing us to see inside the human body in ways that were previously unimaginable.
我远行万里来看世界的奇迹，但真正让我惊讶的是我在旅途中遇到的人。