Definition
This phrase is used when flipping a coin to ask someone to guess whether the coin will land heads up or tails up.
正反面？
We'll flip a coin to decide who goes first, heads or tails?
我們來擲硬幣決定誰先開始，正面還是反面？
Before making this decision, why don't we flip a coin? Heads or tails?
在做這個決定之前，我們為什麼不擲硬幣呢？正面還是反面？
They're using a coin flip to decide what to have for dinner, I bet they will ask: heads or tails?
他們用擲硬幣來決定晚餐吃什麼，我打賭他們會問：正面還是反面？