帮我翻译下面的句子,不用在线翻译,谢谢

帮我翻译下面的句子,不用在线翻译,谢谢
1、1. It is important not to lose heart in the face of danger.
2.On one occasion she attempted to talk to him and his father about this, but his dad quickly interrupted, smiled and said, “You want something, work for it!”
3.Combating ecological changes that directly threatens the health and safety of people is an environmental necessity.