lackn.缺乏;无v.缺乏;不足
lack of skill缺乏技能
lack decision缺乏果断
lack appetite缺乏食欲
lack of money钱不够
lack of tooth缺失牙
lack and loss缺失
lack a quorum有法定人数
lackadaisicaladj.无精打采的;懒散的
lack of sulfur缺硫
lack in energy缺乏精力