Personally, I think it's on the luck of the draw.

就个人来说，我认为取决于抽签分组的运气。

One won and the other lost; that's the luck of the draw.

有人赢就有人输，抽签全靠运气。

The one won and the other lost; that's the luck of the draw.

“一方赢另一方输，抽签全看运气好坏。”。

Did you always strive for the genre thriller or was it the luck of the draw?

你那时其实一直在努力尝试悬疑类型，还是只是因为一时的幸运？

But this was the luck of the draw, for the rituximab failed to kill the cancer stem cells.

但这也许只是运气，因为rituximab没能杀灭干细胞。