Money was a commodity she never thought about except in the abstract.

金钱是她从未具体想过的一种商品。

《柯林斯英汉双解大词典》

They began with abstract thought, discussed it, reminded each other of another abstract point forgotten in the rush of events.

他们从抽象的思想开始，讨论它，相互提醒着在匆忙事件中被遗忘的另一个抽象概念。

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He asserted that his power to follow a long and purely abstract train of thought was very limited, for which reason he felt certain that he never could have succeeded with mathematics.

他断言，在理解冗长且完全抽象的一系列观点方面，他的能力非常有限，因此他深信自己在数学上永远不会成功。

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