barbed spike

例句：

1. 1. The fence was designed to keep the animals in, not out.
   这道篱笆的设计是为了把动物关在里面，而不是把它们赶出去。
2. 2.The barbed spikes were used to secure the tent.
   这些带刺的尖桩被用来固定帐篷。
3. 3. The barbed spikes were a hazard to the workers.
   这些带刺的尖桩对工人来说是危险的。