Kim first saw the need of the book ［when she began helping Korean students at her school ［after they had just arrived in the country］］ 這句中是不是when引導(dǎo)的時(shí)間狀語從句中又包含了一個(gè)after引導(dǎo)的時(shí)間狀語從句？

謝謝，辛苦了。