bù rán
下象棋看起来很容易，其实不然。
Xià xiàngqí kàn qǐlái hěn róngyì, qíshí bùrán.
Playing Chinese chess looks easy, but actually it's not.
不然，事情不像你说的那么简单。
Bùrán, shìqing bù xiàng nǐ shuō de nàme jiǎndān.
Otherwise, things are not as simple as you say.
快走吧，不然就要迟到了
Kuài zǒu ba, bùrán jiù yào chídào le.
Let's go quickly, otherwise we'll be late.