成材的英文：
become a useful person

参考例句：

an exponent of self - education
自学成材的典型

boxed heart check
心材开裂,成材心裂

A school which encourages individual fulfillment
一所鼓励个人成材的学校

He is a self-educated man. He didn't finish even elementary school.
他是一个自学成材的人。他连小学也未读完。

become是什么意思：
v. 成为；变得；适合；相称

To become blunt.
变钝，变迟钝

To become inflated.
膨胀变得充了气的。

To become firm or gelatinous; congeal.
凝固凝结或变硬；冻结

useful是什么意思：
adj. 有用的，有益的

It is used as a reflexive.
它被作为反身代词使用。

That was a balk to us.
那对我们是个挫折。

They help us to be maximal encouraging to us.
他们来帮助我们对我们是个极大的鼓舞。

person是什么意思：
n. 人；身体；外表，容貌；人称

A wanton person.
淫荡的人

an outspoken person
直率的人

You are such a wicked person.
你真是个讨要的人。