hash mark

• 井号（#），也称为号码符号或哈希符号，用于计算机、社交媒体（作为话题标签）或表示数字。

A hash mark is a symbol (#), also known as the number sign or pound sign, used in computing, social media (as a hashtag), or to denote numbers.

1. Symbol on a keyboardA2formal

   The symbol #, also known as the number sign, pound sign, or hashtag symbol.

   井号

   • Press the hash mark key to enter the number.
   • The hash mark is used in programming languages.
   • She typed a hash mark before the word 'trending'.

2. Sports field markingB1formalamerican

   A short line or mark on a sports field, such as in football or hockey, used to indicate positions.

   场地标记

   • The referee placed the ball on the hash mark.
   • The player lined up at the hash mark for the kick.
   • The hash marks on the field help players align correctly.

3. Social media tagA2informal

   A word or phrase preceded by a hash mark (#) used to categorize content on social media.

   话题标签

   • Use the hash mark #travel to find vacation photos.
   • She added a hash mark to her post for better visibility.
   • The hashtag trended after the event.