cloverleaf

詳細解釋：

clo.ver.leaf

n.（名詞）
A highway interchange at which two highways, one crossing over the other, have a series of entrance and exit ramps resembling the outline of a four-leaf clover and enabling vehicles to proceed in either direction on either highway.
苜蓿葉式立體交叉的公路：兩條高速公路的立體交叉道，一條穿過另一條，有一系列入口和出口坡道，與四葉苜蓿的外形相似，車輛在兩條高速公路上均可駛入任一的兩個方向
adj.（形容詞）
Resembling or shaped like a leaf of the clover plant.
形狀似苜蓿葉的：似苜蓿植物葉或其外形的，或與之相似的