Underachieved
v. 学习成绩不良, 未能发挥学习潜能（underachieve的过去式与过去分词形式）
🗣️ 情景例句
He showed no consideration for his wife.
他从不体贴他的妻子。
Books,like friends,should be few and well chosen.
书籍如朋友，宜少宜精选。
only of metal, which wears away by friction.
而是由金属组成，而金属可以随着磨擦而磨损殆尽。