试题题干
Translate the following sentence into Chinese.
You’re sharpest in your 20’s and around 30, memory begins to decline, particularly your ability to perform mathematical computations.
参考答案
试题解析
考点：sharpest 灵敏的( sharp的最高级；decline (v.) 减少，下降；mathematical computation 数学计算。
句子结构：句子为一个并列句。前半句中in your 20’s为时间状语。后半句主干为memory begins to decline。