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
Because my birthday is tomorrow.
因为明天是我的生日。
Thank you for seeing me off.
谢谢你送行。
for the simple reason that I was left with several curiously shaped bits of metal which did not seem to fit anywhere.
原因很简单，因为还剩下几个形状奇特的零件似乎哪里也装不上去。