In those days, the trip across country was a dangerous undertaking.

那个时期，越野旅行是一件危险的事情。

《牛津词典》

Trying to predict the direction of something like the gold price can be a dangerous undertaking.

试图预测诸如黄金等价格走向可以说是一个危险的任务。

youdao

So getting the grapes to the winery every year, across what was often the frontline of warring factions, was a dangerous undertaking.

所以，每年将葡萄运往酿酒厂——经常是穿过交战双方的前线——是一项危险的事业。

youdao

Trying to predict the direction of something like the gold price can be a dangerous undertaking.

FORBES: Gold Prices: Are They Set for a Fall?

The prosecution said passing other vehicles on the inside (undertaking) twice and failing to observe the police motorcycle while travelling at excessive speeds amounted to dangerous driving.

BBC: Biker caught doing 156mph on A1M in Cambridgeshire fined