Problems occur only if a contradiction develops between a new observation, say, "That ball is blue", and the preexisting statements.

只有当一个新的观察，比如“那个球是蓝色的”，与已有的陈述之间产生矛盾时，才会出现问题。

youdao

If you point a blue light toward the silver ball, it would turn bluish.

如果你把蓝光指向银色的球，它就会变成略带蓝色的。

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He likes hitting the blue ball.

他喜欢打蓝色的球。

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The first pictures of Earth taken from space showed a solid ball covered by brown and green landmasses and blue-green oceans.

VOA: special.2011.01.04

The extraordinary lobby of the palace is centered on a marble fountain supported by cherubs, while the sky-blue walls are frescoed with cotton-ball clouds, birds, garlands and idealized rural scenes.

FORBES: Taj Falaknuma Palace: A New Experience of Palatial Splendor

The Ducks built back a 44-28 lead carried by its defense, including Loyd stealing the ball from blue-haired Cody Ellis and finishing strong with a layup on the other end.

NPR: Oregon Blows Past Saint Louis 74-57 In 3rd Round

The Red, White and Blue Inaugural Ball and Hip-Hop Inaugural Ball are also scheduled in the capital.

CNN: Obama sworn in to second term