lack obj lAk v [T] to not have (something, esp. something necessary or wanted) or to not have enough of it 缺乏, 不足 What we lack in this house is space to store things. 我们房子里缺少的是贮藏东西的地方。 I lack the energy that's required to look after children. 我没有照顾孩子的精力。