I think Nietzschean leitmotiv is the transcending thought.

本文试图把超越思想理解为尼采哲学的主旨。

The leitmotiv of the former is presentative, absolute, analytical and coincidental;

前者的主旨是表象的、绝对的、分析的、符合的；

'Learn by perception' is a leitmotiv expressed by scattered silhouettes throughout the building.

零星点缀在大楼各处的人形轮廓表达出了“感知引导学习”的设计主旨。

The author indicates the legal thought leitmotiv in Qin and Han dynasties: Law was unified and established by the emperor.

睡虎地秦墓竹简及张家山汉墓竹简是秦汉时代法律思想及法律制度变迁最直接、最可靠的论据。

Survival comes from quality and benefit is born from management. This is the everlasting leitmotiv of construction enterprises.

“向质量要生存，向管理要效益”是建筑施工企业一贯的主旨。