If you consider that she's only been studying English a year, she speaks it very well.
你可以考虑到她那学一年的英语,她的英语说得非常好。
So when a German buys something from a Japanese, or an Indian sells something to a Frenchman, they may all use English.
因此,当德国人从日本人那儿买东西时,或印度人把东西卖给法国人时,他们可能都用英语进行交流。