YSK that in parenting, HOW you talk to your child matters - it changes their brain. Talking TO or AT your child, even if you are exposing them to many words, is less important than having engaging conversations WITH your child, ideally where your child takes the lead.
from /r/YouShouldKnow
YSK说，在养育孩子的过程中，如何和孩子说话很重要--它会改变他们的大脑。对着孩子说话或对着孩子说话，即使你让他们接触到很多词汇，也不如与孩子进行引人入胜的对话重要，最好是由孩子来主导。