创办自己的公司是一个巨大的冒险，但最终成功了。

Starting his own business was a huge ___gamble, but it eventually succeeded.

她冒险投资股市，结果回报丰厚。

She took a ___gamble by investing in the stock market, and it paid off handsomely.

在疫情期间推出产品的决定是一个经过计算的冒险。

The decision to launch the product during the pandemic was a calculated ___gamble.