stratum

名詞

1. 1

   地層、岩層常用複數 strata

   The lower strata of rock contain fossils millions of years old.

   下層的岩層裡有數百萬年前的化石。

2. 2

   階層、社會階層

   The policy mainly benefits the wealthiest stratum of society.

   這項政策主要嘉惠社會最富裕的階層。

3. 3

   層、層次

   Each stratum of cells was examined under the microscope.

   每一層細胞都在顯微鏡下接受檢視。