来自林晓斌的问题
这句话的upon什么意思?Firstly,citiesbecomemoreandmorecrowded,puttingmuchpressureupontransportation,housing,sanitation,education,employmentandsoon.
这句话的upon什么意思?
Firstly,citiesbecomemoreandmorecrowded,puttingmuchpressureupontransportation,housing,sanitation,education,employmentandsoon.
