He ran so fast that nobody in my class could catch up with him. 他跑得那么快，以至于我们班没有人能赶上他。that引导的结果状语从句，当so与其所修饰的词位于句首时，主句使用倒装结构。
STZ-treated rats， which are totally defective in insulin secretion， are a common model of Type 1 diabetes.
