pace up down in the study是什么意思

pace up down in the study是什么意思 put in/on/down/up分别是什么意思? 改错speed up the pace of urbanization pace是什么意思 Roll up/down是什么意思 we go up and down the apartment building in the Look up to the heaven down in the hell People go up and down in the lift = People go up and down __ were down in the bookshop是什么意思 moving up and down in time with the terrain study hard ,or you can keep pace with the time为什么不是to study I prefer the relaxed pace of life in the country.这句怎么意思,pace