For example, organic cotton and non-organic cotton are virtually indistinguishable once woven into a dress.
例如，有机棉和非有机棉一旦织进一件衣服里，几乎是无法区分的。
2
In classical empiricism, the truth of―"All balls are red," for example, is assessed by inspecting balls; any observation of a non red ball refutes unequivocally the proposed generalization.