Standard rubber bands, which can stretch up to several hundred percent then snap back into shape, are made from long chains of cross-linked polymers.

标准橡皮筋由交错连接的长链聚合物制成，能拉伸至原先长度的几倍，释放后可缩回原型。

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Lean against the back and stretch your legs out. Cross your ankles so that your left (if male) or right (if female) ankle overlaps your other ankle.

交叉脚踝，让你的左脚踝(男)或右脚踝(女)叠在另一只脚踝上。

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Standard rubber bands, which can stretch up to several hundred percent then snap back into shape, are made from long chains of cross - linked polymers.

标准橡皮筋由交错连接的长链聚合物制成， 能拉伸至原先长度的几倍，释放后可缩回原型。

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By the way, a 20-mile stretch of the Cross Bronx Expressway in New York was determined to be the most congested traffic corridor in the U.S., taking 54 minutes to traverse at an average speed of just 13 mph, representing a whopping delay of 41 minutes.

FORBES: The World's Most Traffic-Congested Cities

St Johnstone were more enterprising at the start of the second half and Samuel should have scored when he latched on to Cleveland Taylor's cross but the striker elected to stretch out a foot instead of heading the ball and the effort was collected comfortably by keeper Brown.

BBC: Sport - Football - Hibernian 0-0 St Johnstone

Later on I will have a family-sized cabin to stretch out in as we cross Nebraska.

CNN: Amtrak train: No better way to connect with U.S. voters