toss-up

n. 掷钱, 难以定夺的事

例句与用法：

Both players are equally good so it's a toss-up (ie impossible to predict) who will win.

那两个运动员不相上下，谁能取胜还很难说。

词形变化：

名词: tosser | 动词过去式: tossed | 动词过去分词: tossed | 动词现在分词: tossing | 动词第三人称单数: tosses |

详细释义：

n.

1. (决胜负的)掷钱币

2. 【口】胜负各半的机会; 难以决定的事

The election was a toss-up, the winner still hasn't been determined.

这场选举胜负难分, 截至目前还不知鹿死谁手。