toss-up
US /ˈtɑːs ʌp/
UK /ˈtɑːs ʌp/
1.
未知數, 勢均力敵, 不確定性
a situation in which either of two choices or results is equally possible and it is impossible to predict which will happen
:
•
It's a toss-up whether she'll get the job or not.
她能否得到這份工作還是個未知數。
•
The election is a real toss-up between the two main candidates.
這次選舉是兩位主要候選人之間的真正勢均力敵。