They seem like the hard rock maple trees often found in that area, nothing can make them move.

VOA: special.2009.03.07

Rock believed in souls, he just didn't think they were the key to personal identity.

洛克相信灵魂论，但他认为,这并不是人格统一性的关键。

耶鲁公开课 - 死亡课程节选

and they offer leisure class that's indoor rock climbing.

学校有休闲课，就是室内攀岩。

攀岩的刺激 - SpeakingMax英语口语达人

They were suspended from ropes as they used heavy air-powered hammers to break any loose rock away from the face of the canyon walls.

VOA: special.2009.08.12

They wanted to sell us little pieces of rock crystal.

她们便蜂拥而上，向我们兜售起小块的水晶石。

耶鲁公开课 - 1945年后的美国小说课程节选

They collected more than thirty kilograms of rock and soil to take back to Earth.

VOA: special.2009.07.15

Well,here's one other that you might not have thought of, and that is that most of the chords in rock music in particular tend to be root-position chords, and for that reason they're easier to hear.

还有另外一点也许大家还没有想到，那就是摇滚乐的主要和弦尤其倾向于变成根和弦，因此他们听起来也更加容易。

耶鲁公开课 - 聆听音乐课程节选

Now,as they came to the Pecos River, the wagon hit a big rock.

VOA: special.2009.11.28

Rivers created the area as they cut rock into many different formations.

VOA: special.2009.04.15

They include best rock instrumental and best contemporary jazz recording.

VOA: special.2010.03.12

They named one of them "the Genesis Rock."

VOA: special.2009.07.29

(OMINOUS ROCK THEME PLAYING) They were leaving. Then they heard us.

VOA: standard.other