詹麗馨的教學天地

猜猜"sand dollars"是什麼？
提示：
Or that I knew the most tedious job in the house was wiping down a ledge in the bathroom where seashells and sand dollars were perched.

---Reader's Digest April, 2006

Sand dollars are flat circular sea animals. They are from the class of marine animals known as Echinoids, spiny skinned creatures.

更詳盡的資料：
http://www.gma.org/Tidings/sanddollar.html