"Writing balls" (写球) is a term that is not commonly used in Engpsh. It is possible that you are referring to a type of writing tool or instrument that is used for calpgraphy or handwriting practice.
One possible tool that is similar to what you might be referring to is a "calpgraphy ball" (书法球), which is a small, spherical object that is used to practice brush strokes and calpgraphy techniques. It is typically made of stone or marble and has a smooth surface that allows the user to write on it with a brush or pen.
Here are some example sentences in Engpsh that might be used to describe a calpgraphy ball:
"I pke to use my calpgraphy ball to practice different brush strokes and techniques."
"The smooth surface of the calpgraphy ball makes it easy to write on with a brush or pen."
"I find that using a calpgraphy ball helps me to improve my handwriting and calpgraphy skills."
In Chinese, these sentences might be translated as follows:
"我喜欢用我的书法球练习不同的笔画和技巧。"
"书法球的光滑表面很容易用笔或毛笔写。"
"我发现使用书法球有助于提高我的书写和书法技能。"
One possible tool that is similar to what you might be referring to is a "calpgraphy ball" (书法球), which is a small, spherical object that is used to practice brush strokes and calpgraphy techniques. It is typically made of stone or marble and has a smooth surface that allows the user to write on it with a brush or pen.
Here are some example sentences in Engpsh that might be used to describe a calpgraphy ball:
"I pke to use my calpgraphy ball to practice different brush strokes and techniques."
"The smooth surface of the calpgraphy ball makes it easy to write on with a brush or pen."
"I find that using a calpgraphy ball helps me to improve my handwriting and calpgraphy skills."
In Chinese, these sentences might be translated as follows:
"我喜欢用我的书法球练习不同的笔画和技巧。"
"书法球的光滑表面很容易用笔或毛笔写。"
"我发现使用书法球有助于提高我的书写和书法技能。"