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It gives you a sense of
achievement
if you actually make it to the end of a very long book. 如果你能真正读完一本厚书，就会有一种成就感。
Not enough attention is given to the low
achievers
in the class. 班里的后进生没有得到足够的关注。
Cheap, pesticide-free food is probably an
unachievable
objective. 便宜而无农药的食物大概是不可能实现的目标。
He is a graduate of a prestigious university, who likes to
overachieve
. 他是一所名校的毕业生，喜欢争强好胜。
Like a lot of boys of his age, he’s
underachieving
. 跟许多同龄的男孩子一样，他没有发挥出他的潜能。