kaiser roll       
noun [ C ] US (also Kaiser roll) uk/ˌkaɪ.zə ˈrəʊl/ us/ˈkaɪ.zɚ ˌroʊl/
 凯撒面包(表面有蔷薇花状划痕的小圆面包)
a round bread roll with a thick crust that usually has five lines cut into the top forming a star shape
  We bought some kaiser rolls from the local delicatessen.
 For lunch I had a juicy cheeseburger served on a classic Kaiser roll.  午餐时,我吃了一个多汁的奶酪汉堡,用的是传统的凯撒面包。 
 - More examples
 - A delicious and fulfilling breakfast sandwich can be made from bacon, egg, and cheese inside a kaiser roll.
 - In Austria and Germany, Kaiser rolls are often eaten with sliced cold meat for breakfast.