horseshoe

The smith forged the horseshoe with great skill.

那铁匠非常熟练地锻造马蹄铁。

It lays its eggs (like the one above) only on horseshoe vetch, a European perennial.

它只在欧洲多年生植物马蹄野豌豆上产卵（如上图）。

Their ability to go on a sustained eating binge while at the bay is due entirely to another creature: the horseshoe crab. These bizarre animals are among the oldest on Earth.

让它们能不停地在特拉华湾狂吃的原因，完全是因为老天爷在那里安排了另一种生物：马蹄蟹，地球上最古老的奇怪的动物。