necessary
[ˈnesisəri]
adj.
必要的; 必需的
It took me a year to get the necessary materials together.
我花了一年的时间才把所需要的资料组织好.
必然的; 不可避免的
Because the company was doing more business it was necessary to expand the factory.
由于公司业务的扩大,扩大工厂是必然的.
n.
必需品
He has enough money to obtain the necessaries of life.
他有足够的钱购买生活必需品