a strong cord that stretches, sometimes with a hook at each end, used to hold things in place

Make sure the shock cords on the front of bike rack are fixed securely. 确保自行车架前部的弹力绳固定牢固。

Shock cord can be used for anything from a makeshift clothesline to keeping your trousers up. 弹力绳可以有很多用途，从临时晾衣绳到代替皮带束起长裤。