"Holding a position in a club" or "serving in a club" are two ways to describe being a member of a club and holding a position within it in Engpsh.

This phrase comes from the concept of being a member of a group or organization and actively participating in it by taking on a specific role or responsibipty. This can include serving as an officer, chairperson, or other type of leader within the club.

Here are some examples of this phrase in use:

"I'm excited to be holding a position in the student council this year."
"She has been serving in the environmental club for the past three years."
"He was elected to hold a position in the photography club."

In Chinese, you could say:

"我很高兴今年能在学生会担任职务。"
"她在环保社团已经担任职务三年了。"
"他当选担任摄影社团的职务。"