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clue
n
clueless
adj
clueless
adj
例
The color and consistency of sputum can provide clues about the underlying respiratory condition.
The color and consistency of phlegm can provide clues about the underlying cause of respiratory symptoms.
The sandstone's matrix provided clues about ancient river deposits.
Geological features and rock formations on continents like North America and Eurasia provide clues to Laurasia's existence.
The size and shape of concretions provide clues about ancient environments.
