It was a difficult and dangerous undertaking.

非常艰难而且危险。

Migration can be a dangerous undertaking, and every year many owls suffer the hazards of power lines, traffic and industry.

迁徙是一项很危险的事情，每年都有很多猫头鹰受到电线、交通和工业的危害。

Jerome says, " This is a dangerous undertaking, " meaning you might get hurt.

杰罗姆说，“这是一项危险的任务，”意思是你可能会受伤。

Jerome begins our dialogue by saying to Sandy, " This is a very dangerous undertaking."

杰罗姆开始我们的对话时对桑迪说：“这是一项非常危险的任务。