Retention period
[計(jì)] 保存期
?? 詞語(yǔ)組成解析
retention
[ri'ten??n]
n. 保留;記憶力，保持力;滯留，扣留;閉尿;
period
['p?r??d]
n. 時(shí)期;（一段）時(shí)間;學(xué)時(shí);句號(hào);
adj. 具有某個(gè)時(shí)代特征的;（關(guān)于）過去某一特定歷史時(shí)期的;（家具、服飾、建筑等）某一時(shí)代的;
peri周圍，靠近+od道路→周期
??? 情景例句
It was an extremely difficult and dangerous task.
這是一項(xiàng)極度困難的危險(xiǎn)的工作。
Marriage goes by contrasts.
夫妻之間難免有差異。
How much cloth does it take to make a skirt for the girl?
女孩做一條裙子要用多少布？