unsubstantial
adj. 無實質的,不堅固的,薄弱的
1. lacking material form or substance; unreal;
Within a minute afterwards, he was, to all outward appearance, as unsubstantial as ever.
此後不到一分鐘他的神色又跟過去完全一樣滿不在乎了.
In every joint of this chain joint is the most unsubstantial one.
在這個鏈條的各個環節中,我國最薄弱的是營銷環節.
Especially the theory study and the system construction of tourism planning are unsubstantial.
其中,旅遊規劃的理論探索和體系建設尤其薄弱.