“常见的”用英语怎么说？

湿疹是一种常见的皮肤病，通常具遗传性。Eczema is a common skin complaint which often runs in families.这种产品看起来和点燃后都与常见的香烟没什么两样。The product looks and burns like a regular cigarette.15年的寿命对狗而言是比较常见的。A 15-year lifespan is not uncommon for a dog...