They learn first hand about the health and nutrition of dairy cattle, as well as the science of making butter, cheese, and other dairy products.

他们亲自了解有关奶牛的健康和营养知识，以及制作黄油，奶酪和其他乳制品的技术。

youdao

We learn first-hand about the principles of gravity the first time we fall down, and we experience many other physical laws early on in our lives.

我们在第一次摔倒的时候就学会了重力原则，我们在小的时候就感受到了许多其他的物理法则。

youdao

We were able to hear from Iraqis first hand about what life was and is like: how it has changed and whether things were getting better or worse over time.

我们因此得以从伊拉克人那里获得有关生活今昔对比的第一手情况：生活有哪些变化，情况是在好转还是在恶化？

youdao

The researchers did a study of adult beliefs about the possibility of health risks to children from third-hand smoke.

VOA: special.2009.01.07

In approach number one, you simply lay out the various positions, pro and con, and the professor strives to remain neutral; sort of not tip his hand about what he holds.

方法一，你们简单的列出不同的观点，正面和反面，老师争取保持中立;,不表明他支持哪边。

耶鲁公开课 - 死亡课程节选

take a look at page 917, the left-hand column, where Derrida is talking not about Levi-Strauss but about Saussure.

看一下第917页，左边，这里德里达不是在说列维而是在说索绪尔。

耶鲁公开课 - 文学理论导论课程节选

That way, you can find out first-hand about stories in another part of the UK - or in another country entirely - without leaving the classroom.

BBC: Story ideas for 2011 News Day

As a former elementary school teacher and a dad of a 12 year old I know first-hand about how teaching and learning is quickly moving into a digital environment.

FORBES: Educators Dive into Digital

There are, of course, great examples of visionary leaders taking the time to learn: Walt Disney visited Tivoli Park in Copenhagen to learn first-hand about family amusement parks before creating Disneyland.

FORBES: Ready, Fire, Aim!