tim@tim-virtual-machine:~/rails_projects/first_app$ bundle install
ERROR: RVM Ruby not used, run `rvm use ruby-1.9.3-p448@rails3tutorial` first.
tim@tim-virtual-machine:~/rails_projects/first_app$ rvm list
rvm rubies
=* ruby-1.9.3-p448 [ i686 ]
ruby-2.0.0-p247 [ i686 ]
# => - current
# =* - current && default
# * - default
我目前正在使用 ruby-1.9.3-p448,但是为什么命令 'bundle install' 提示“错误:未使用 RVM Ruby”?