Certain annuity
[医] 一定年金\\n[经] 确定年金
🧩 词语组成解析
certain
['sə:tən]
adj. 某一;必然的;已确定的;
pron. [动词用复数]某些;
🗣️ 情景例句
I heard the professor of that class is very good.
我听说那个班的教授很好。
By reading we enrich the mind; by conversation we polish it.
读书可以使我门的思想充实，谈话使其更臻完美。
That does not prove that it does not exist;
这并不是证实不存在噪音对健康的影响。