I have no idea what they're going to say, so I'll have to play it by ear.
我一点不知道他们将会说些什么,所以我只好见机行事。
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。