锯齿状

例句：

1. 1. The car's hood has a serrated edge that makes it difficult to open.
   这辆车的车盖有一个锯齿边缘，很难打开。
2. 2. The knife blade is serrated, making it sharper and more durable.
   这把刀的刀刃是锯齿状的，所以它更锋利、更耐用。
3. 3. The roof of the house has several serrated tiles for added protection against the elements.
   这所房子的屋顶有几块锯齿状的瓦片，以增加对各种天气的保护。