spinasternum

例句：

1. 1. The spinasternum on the tree is a symbol of strength and resilience.
   树上的刺是力量和韧性的象征。
2. 2. The spinasternum on the ground is a reminder of the hard work that goes into maintaining a garden.
   地面上的刺提醒我们维护花园需要付出辛勤的努力。
3. 3. The spinasternum on the fence is a warning to potential trespassers.
   围栏上的刺是对潜在入侵者的警告。