Because no modern land animals even approach sauropod size, scientists have also lacked a living analogue to use as a guide to possible sauropod behavior.

因为现代陆地动物的体型都比不上蜥脚类动物，科学家们也缺乏一种类似的活物参考以了解蜥脚类动物可能做出的行为。

youdao

A trained dog can act as a guide to a blind person.

经过训练的狗能担任盲人的向导。

《新英汉大辞典》

Use Figure 37 as a guide to complete this.

使用图 37 作为完成这一步的指导。

youdao

Then he used the plaster form as a guide to make the final statue out of bronze metal.

VOA: special.2010.05.31

As a model of economic activity or as a kind of vocation guide, this parable couldn't be more opposed -- or to some wouldn't seem more opposed - to the parable of the unprofitable servant.

作为一种经济活动,或者职业引导的典型,这则寓言于那个没获利的仆人的,寓言截然相反。

耶鲁公开课 - 弥尔顿课程节选

And we have the capacity as a government to reinforce that process, and help guide this economy back to the point where we are not just growing again, but we see growth translate into jobs."

VOA: standard.2010.02.07

Don't count on history to serve as a guide to what markets will do.

FORBES: Election 2008

It could serve as a guide to those who want to help poor countries escape the poverty trap.

FORBES: How Russia Went Down A Dead End

You can buy from carsdirect or use it as a guide to what price you want to beat.

CNN: Cheaper cars -- but still ways to save