They were content with the simple things in life that come free: a beach day, a horsey back ride from daddy, a story and a back scratching from mommy, pillow-and-blanket tents in the living room.

他们对生活中免费而又简单的事情很知足：在海滩上玩一天，爸爸背着回家，妈妈讲讲故事或者挠挠背，在客厅搭“枕头床单”帐篷。

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It provides a raised area at the back of the phone which helps stop you scratching the handset when you put it down.

它在手机背面提供了一个抬高的区域，以助于防止你在放下它时把电话听筒划伤。

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A moment later, he rounded the corner, rolling his shoulders and then scratching his back on the doorjamb like a bear against a tree.

片刻之后，他从拐角绕了出来，转动着肩膀，然后在大门柱上蹭着背，就像一只熊靠着树那样。

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You could say we get involved in cases of exceptional greed versus normal back-scratching.

FORBES: Emerging New Fiduciary Trends and Developments: Systems of Mass Deception vs. Systems of Enhanced Diligence (September 1, 2003)

This invisible network of mutual back-scratching made it difficult for anyone outside the military to control it - or even understand it.

CNN: A Question Of Loyalty

In China such back-scratching is all part of guanxi, or relationship building.

FORBES: Hollywood's Mr China: Dan Mintz, DMG