中文词源
stratum 层，岩层，地层
来自拉丁语 stratum,展开物，覆盖，铺盖，道路，中性格于 stratus,展开，展开的，铺开的， 过去分词格于 sternere,展开，铺开，伸展，来自 PIE*ster,展开，伸展，词源同 strew,street.后 用于科学术语指岩层，地层等。
英语词源
- stratum (n.)
- "horizontal layer," 1590s, from Modern Latin special use of Latin stratum "thing spread out, coverlet, beadspread, horse-blanket; pavement," noun uses of neuter of stratus "prostrate, prone," past participle of sternere "to spread out, lay down, stretch out," from PIE *stre-to- "to stretch, extend," from root *stere- "to spread, extend, stretch out" (see structure (n.)).
权威例句
- 1. It was an enormous task that affected every stratum of society.
- 这是一项影响到社会各阶层的重大工作。
- 2. An aquifer is a water - bearing rock stratum such as sandstone and chalk.
- 地下蓄水层是一些有水的岩石层,如沙岩和白垩岩.
- 3. Such inequalities are found in every stratum.
- 这类不公平的现象存在于社会的每一个阶层.
- 4. Tramps are from the lowest stratum of society.
- 流浪汉来自社会最下层.
- 5. Tramps are in a low stratum of society.
- 流浪汉生活在社会的下层.
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