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In other words, they play in order to practice survival skills, like movements used in hunting and fighting.

换句话说，他们的玩耍是为了练习生存技能，比如狩猎和战斗中运用的动作。

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She says that Earth Day is still very much about activism and fighting for the environment on a local level.

VOA: special.2010.04.21

One was Calkis and the other one was Eretria and we hear about them relatively early in the eighth century, already being very important, very strong and fighting each other in a famous war that they fought.

卡尔基斯和埃雷特里亚,人们早在八世纪就对它们有所耳闻,那时,它们很重要,很强大,在一场著名的战争中相互敌对

耶鲁公开课 - 古希腊历史简介课程节选

Then when that fighting starts, they oughta feed you on buttermilk and black-eyed peas and let you break wind!"

为了让你有气力,他们会在战前填饱你，“

耶鲁公开课 - 1945年后的美国小说课程节选

He is for market liberalization and fighting corruption in government and in the private sector.

CNN: Can war-torn Syria hold fair election?

In clinical trials these substances have killed germs and showed potential in preventing cancer and fighting heart disease.

FORBES: Next Step For Garlic Lovers? Connoisseurship

These days Edelman, 71, is spending his time running his art financing firm--and fighting off lawsuits.

FORBES: Magazine Article