If you go back far enough, everything lived in the sea.

如果你回溯得足够远，一切生物都生活在海里。

youdao

If you go back to daily news, try cutting down to 20 minutes or less.

如果你重新阅读每日新闻，尝试把时间减少到20分钟以下。

youdao

If you go back to Listing 9, we don't just build the table of services.

如果返回到清单9，则不只是构建服务表。

youdao

"If you go back to 2001, there were huge numbers of terrorists, under Taliban control, being trained in terrorist training camps to target this country and others,".

VOA: standard.2009.08.02

And if you go back to here and click on Archive Notes, it is the fourth button down that will take you to something that looks like this.

如果你们回到这来，点击存档笔记，是倒数第四个,你们会看到像这样的情况。

麻省理工公开课 - 固态化学导论课程节选

If you go back to this particular graphic, the interesting thing is how have humans changed and what are they like now.

如果你回过头来看这张图,思考人类是如何演化的,现在又成为什么样

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

"The city was once very vibrant, if you go back into time, " he said.

CNN: Urban rebirth: Johannesburg shakes off crime-ridden past

And if you go back to that month -- we had 741, 000 jobs lost.

WHITEHOUSE: Press Briefing

"If you go back far enough, you're probably connected to everyone you know, " he says.

WSJ: Using Wikis and Other Forms of Group Research, Family Historians Are Making Surprising Connections