However, when two monkeys were placed in separate but adjoining chambers, so that each could observe what the other was getting in return for its rock, their behavior became markedly different.

然而，当两只猴子被放置在不同但相邻的房间里，以便让它们观察到对方用石头换来了什么时，它们的行为就变得明显不同了。

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A least tern checks on its rock-colored eggs on a Gulfport, Mississippi (map), beach on Saturday.

上周六，密西西比海湾港的一处沙滩上，一只小燕鸥正在检查自己布满斑点的蛋。

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A key attribute of the mainframe over the years has been its rock-solid security at the hardware and software level.

大型机多年来的一个关键特征是在硬件和软件级别具有可靠的安全性。

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The Rock and Roll Hall of Fame is celebrating its twenty-fifth anniversary with two concerts later this month in New York City.

VOA: special.2009.10.19

So the city is proud of its latest nickname, The Rock and Roll Capital of the World.

VOA: special.2010.03.21

Looking down at a piece of the famous rock, Cari Corrigan suggested its historic importance.

VOA: special.2010.07.28

He loves this place, its rock formations and the choppy sea that changes by the hour.

BBC: Travelling solo in the world��s most romantic country

Perthshire-based Colin Andrew Smith Architect also won an award in the private dwelling category for its Rock House.

BBC: Entries sought for Scotland's oldest design awards

He likes Ryerson for its rock-bottom ratios like 0.14 times sales, one times book value and 10.7 times trailing 12 months of earnings.

FORBES: Strength In Steel Schlepping