unsubstantial

Within a minute afterwards, he was, to all outward appearance, as unsubstantial as ever.

此后不到一分钟他的神色又跟过去完全一样满不在乎了.

英汉文学 - 双城记

In every joint of this chain joint is the most unsubstantial one.

在这个链条的各个环节中,我国最薄弱的是营销环节.

互联网

Especially the theory study and the system construction of tourism planning are unsubstantial.

其中,旅游规划的理论探索和体系建设尤其薄弱.

互联网