I have a rat.

我有一只老鼠。

youdao

The rat! I saw it!

那只老鼠！我看见它了！

youdao

Where I come from, you don't rat on your friends.

在我的老家，谁都不出卖朋友。

《牛津词典》

"It was what I call a rat's-eye view of the Titanic, " says Greenwald.

FORBES: Magazine Article

"I've seen it all, all that rat-race stuff, the arms-race stuff, " said Mr. Nye.

WSJ: From Patents to Memberships, Coffee Shops Offer New Perks

"I don't like it when it's a rat-pack bar" filled with a wall of liquor bottles and lined with bar stools, says Mr. Smith.

WSJ: Creating a Dining Room With Wow Factor