TY - GENERIC DO - 10.20944/preprints202103.0540.v1 UR - http://dx.doi.org/10.20944/preprints202103.0540.v1 TI - Is There a Critical Period for Second Language Acquisition? A theoretical Social Physics Approach T2 - Preprints AU - Han, ZhaoHong AU - Bao, Gang PY - 2021 DA - 2021/03/22 PB - Preprints