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。

youdao

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。

youdao