to detect at an early stage
Fiil
to make a reconnaissance
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to reconnoitre the grounds
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to fiddle over a job
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to find the secret of doing sth
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to be up to one's tricks
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to come upon something
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to strike on something
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to strike upon something
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to come across something
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to come on something
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(to) reinvent the wheel
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to explore the Arctic region
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to find out the precise facts
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