You may be happy to buy imitation leather, and then again, you may wonder what you're getting for your money.

你可能乐于买仿制皮革，然后你也许又想知道你花的钱买到的是什么。

《柯林斯英汉双解大词典》

For long there was no answer, then again the knock.

很长时间没有回答，然后又是敲门声。

youdao

"Then again, how could they not have known?" Gary says.

“那么又来了，他们怎么会不知道?”加里说道。

youdao

Then again. That was the signal to attack.

VOA: special.2009.11.05

The Fed then again cut interest rates in 2001 in response to the very definite weakness of the economy.

美联储在2001年又一次降低了利率1,为了适应经济中明确的弱点。

耶鲁公开课 - 金融市场课程节选

There's not really plural form of verbs in Korean, so then again it's also difficult.

韩语中真地没有动词复数形式，所以这一点也比较难。

韩国人经常犯的失误 - SpeakingMax英语口语达人

Then again, getting something for nothing is a concept that MTV should be familiar with.

FORBES: Is MTV Aging Well?

Then again, in this economy, having a full roster may not be an option.

FORBES: How To Slim The Ranks

Then again, the topic has been a sticking point in the campaign of late.

NPR: Obama, McCain Speak At Community Service Forum