Simplify the following text for a Grade 6 native English-speaking person.
Original: For an STM , good resolution is considered to be 0.1 nm lateral resolution and 0.01 nm depth resolution .
Simplified: For STM , good resolution is 0.1 nm lateral resolution ( how accurately it can see on the surface ) and 0.01 nm depth resolution ( how accurately it can see under the surface ) .