刺块

例句：

1. 1. The thorn on the rose is sharp enough to draw blood.
   玫瑰上的刺足够锋利，能划出血来。
2. 2. The barbs on the needle are designed to catch the insect.
   针上的刺是为了捕捉昆虫而设计的。
3. 3. The tiger's mane is a natural defense mechanism against predators.
   老虎的鬃毛是一种自然防御机制，用来抵御捕食者。