1. The fishermen anchored their boat at the tidehead and waited for the incoming tide.
渔民们在潮头把船停下来，等待着涨潮。

2. This beach is known for its dangerous tideheads, so it's important to be cautious when swimming here.
这个海滩以危险的潮头而闻名，所以在这里游泳时要格外小心。