Silk is also used for the safety lines many spiders drag behind them, which save them if they fall.

蛛丝也是许多蜘蛛拖在身后的安全索，能在它们跌落时保住小命。

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He was barely able to drag his poisoned leg behind him.

他勉强拖着中了毒的腿向前走。

《柯林斯英汉双解大词典》

Since the lower regions of the cable are moving slower than the higher ones, a rising car will lag behind the orbiting anchor, causing a drag on the cable that could destabilize the entire assembly.

由于较低部位的电缆比较高部位的电缆移动慢，上升的电梯箱将落后于转动锚点，这样就会引起一个拖拽并可能进一步破坏整个装置的稳定。

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One method:Drag a shipment underwater behind a fishing boat.

FORBES: Magazine Article

Microsoft may not have a great many friends these days, but it does drag a long value chain behind it.

ECONOMIST: Dealing with Microsoft

This is kind of a shadow recession, its effects lagging behind the first and putting a drag on the recovery.

FORBES: Is Fire Protection a Right or a Privilege?