People need to be satisfied of the need for a new system.
需要使人们明白建立一个新体系的必要性。
Contact with other people is a basic human need.
和他人接触是人的基本需要。
We need to evaluate how well the policy is working.
我们需要对这一政策产生的`效果作出评价。
In case you should need any help, here's my number.
万一你需要帮助的话，这是我的电话号码。
Health care must be at the service of all who need it.
医疗保健机构必须为所有需要者提供服务。