inside out 彻底地(里面翻到外面)
back and forth 来回地,反复地
in and out 进进出出
the pros and cons:赞成和反对的论据
on and off:断断续续地
收集跟upside down类似的短语
inside out 彻底地(里面翻到外面)
back and forth 来回地,反复地
in and out 进进出出
the pros and cons:赞成和反对的论据
on and off:断断续续地