专业医学词典
toss-up
简明英语-中文词典
< toss-up >
<<名词>>
1 掷硬币, 丢铜板 (决定某事)
2 输赢各半的机会
It's quite a toss-up whether she'll come or not. 她来不来很难说
3 碰运气的事

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