Encara no tenim significats per a "unusual briskness".
1At that juncture Mrs. Merston came forward with unusual briskness.
2But it chanced that the wind was fair, and blew with an unusual briskness from the north.
3To see dogs on the chase of foxes, and other large game, denotes an unusual briskness in all affairs.
4To see a crowd in the street, indicates unusual briskness in trade and a general air of prosperity will surround you.
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