He had only seven rounds of ammunition for the revolver.

他只有7发左轮手枪的弹药。

《柯林斯英汉双解大词典》

Seven rounds. Most rounds were on the Internet.

七轮，大部分是在网上。

youdao

In subsequent rounds best-of-seven series are played, with the first team to earn four victories winning the round.

接下来的每轮比赛均采用7局4胜制，即先获得4场胜利的球队出线。

youdao

As a result, the draft is becoming increasingly irrelevant: It once lasted seven rounds but is now just two.

WSJ: Soccer: The MLS SuperDraft: The Most Meaningless Draft in Sports

Now that Wadsworth is cancer-free and feeling healthy after seven rounds of chemo and a double-mastectomy, her attitude flipped.

CNN: Breast cancer awareness: Not so pretty pink

So, heading into the NFL draft on Thursday, look for the Giants to fill many holes on defense in the seven rounds.

WSJ: Determined Giants on the defensive as draft nears