1. Finally, some advices in the design of unsymmetrically loaded double-arch tunnel are given.

2. A type of chiral molecular tweezers has been designed and synthesized by using diphenic acid as spacer and chiral unsymmetrically disubstituted urea as arm for the first time.

3. The paper introduces the measures adopted to treat the severe defects in the lining of an unsymmetrically loaded multi-arched highway tunnel with large-scale cracks in the mountain mass above it.

4. In this paper, based on model test and reliability theory, the mechanical behavior of unsymmetrically loaded tunnels is studied.

5. With its huge, uncouth, gnarled arms and fingers sprawling unsymmetrically , it stood an aged, angry, and scornful monster among the smiling birches.