Stratal
a. 层的, 地层的
🗣️ 情景例句
Stocks, shares and bonds are good alternatives for personal investment.
储蓄、股票和债券是个人投资很好的选择。
The bus is bigger than other cars, but too crowded.
巴士虽然比小汽车大，但是太拥挤了。
Can we substitute in these things?
这几项可以用替代品吗？