One cannot see the wood for the trees.

不能只见树木不见林。

Some people cannot see the wood for the trees.

有人只见树不见林。/ 一叶障目， 不见泰山。

Teachers sometimes notice language errors and do not see the good ideas in a composition; they cannot see the wood for the trees.

老师们批改作文时，时常只注意到语言错误，而不注意文章的思想，真是因上失大。

Some people cannot see the wood for the trees .

有些人只见树木不见森林。

Good class design and OO techniques help address this in Java, but I still often find when reading Java code that I cannot see the wood for the trees.

优秀的设计和OO技术可以增强Java代码的表现性，但我读Java代码的时候，仍然常常见木不见林。