scratch the surface

Translations
поверхностно изучать
He only scratched the surface of the topic during the presentation.
Он только поверхностно изучал тему во время презентации.
Definitions
To only deal with or understand a small part of a subject or issue, without exploring it in depth.
Words
scratch

verb
затрагивать
the

article or possessive pronoun
эту
surface

noun
поверхность