小男孩跨坐在长凳上，晃着双腿。

The little boy ___straddled the bench, swinging his legs.

这条山脉横跨两个国家，形成自然的边界。

The mountain range ___straddles the border between two countries.

这家公司试图在环保与经济利益之间保持平衡。

The company tries to ___straddle environmental concerns and economic benefits.