Lack+of＋名詞： The plants died for lack of water.
Lack+名詞： We lack the strength to walk any further.
短語： be lacking:欠缺、缺： Money was lacking to complete the building.
Be lacking in缺乏（某種品質、特點等）,不夠： He is not lacking in intelligence.
Lack for 缺（多用於否定句） She does not lack for friends.