unsubstantial

adj.

无实质的，不坚固的，薄弱的；

The Unsubstantial Air
The Unsubstantial Man in the Virtual Space
The Unsubstantial Air: American Fliers in the First World War
Study on the the unsubstantial locations index for voltage sags
The Unsubstantial Air: American Fliers in the First World War by Samuel Hynes
Friel's Three sisters: the problems of unsubstantial words
Study on the Evaluation Index of Voltage Sags Ⅰ:Unsubstantial Location Index
Prevention and cure of medium-sized andmini-sixed unsubstantial walls built by concrete,etc
The Danish City Court of Århus inflicts an unsubstantial fine for price fixing (Veterinary surgeons)
THE OFFENSE PRINCIPAL THEORY IN CRIMINAL LAW – BETWEEN EXIGENCY AND UNSUBSTANTIAL