But because of the limitation of detention means, the various bridge types and the completions of the structure, the evaluation work is always a difficult topic.

但由于桥梁的型式多样、结构复杂及检测手段的局限性，使之成为难以解决的科研课题。

youdao

But because of the limitation of detention means, the various bridge types and the completions of the structure, the evaluation work is always a difficult topic.

但由于桥梁的型式多样、结构复杂及检测手段的局限性，使之成为难以解决的科研课题。

youdao