Within a minute afterwards, he was, to all outward appearance, as unsubstantial as ever.
此后不到一分鐘他的神色又跟過去完全一樣滿不在乎了.
英漢文學 - 雙城記
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.
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Especially the theory study and the system construction of tourism planning are unsubstantial.
其中,旅游規劃的理論探索和體系建設尤其薄弱.
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"as insubstantial as a dream"
"an insubstantial mirage on the horizon"