They are chasing squirrels.

他们在追赶松鼠。

youdao

She raced around chasing imaginary mice and squirrels and vaulted from table to chair in the blink of an eye, so we named her Lightning.

她到处追逐想象中的老鼠和松鼠， 一眨眼的工夫就从桌子上跳到椅子上。所以我们管她叫“闪电”。

youdao

Pulling from the curb, I noticed two squirrels chasing each other up one of the pecan trees.

开车走的时候，我留意到两只松鼠互相追逐着，爬上了其中一棵山核桃树。

youdao

He stood staring at the invoice for a long time as the squirrels began chasing one another above their heads.

NEWYORKER: Idols