I don't have a red ball.

我没有一个红色球。

youdao

I have a yellow ball. I don't have a red ball.

我有一个黄色球。我没有一个红色球。

youdao

The clouds were drifting among the sharp hills covered in deep forest over which the sun rose, a red ball of fire.

浮云在被森林覆盖的群山中飘逸，太阳慢慢升起，像是燃烧的火球。

youdao

In Test cricket they always wear whites and play with a red ball, whereas in the shorter game they wear coloured clothing and play with a white ball.

BBC: The difference between Test and limited-overs cricket

Television star Zooey Deschanel went the princess route in a strapless red ball gown from Oscar de la Renta.

FORBES: The Red Carpet At The 2013 Golden Globe Awards

Traditional mementos, such as a red-sequined ball gown from a state dinner and scribbled-on speech cards, also are on display.

WSJ: Email Trove Is Big Job for Bush Library