Yùndòngyuán sàiqián huì zài liǎnshang tú fánshìlín fángzhǐ cāshāng.
Athletes apply Vaseline to their faces before a match to prevent abrasions.
Tips
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凡士林 is a phonetic loanword from 'Vaseline.' The characters 凡士林 carry no independent meaning, just sound. Think of it as 'van-si-lin' approximating 'Vaseline.'