Definition: If something that you need is lacking, you do not have enough of it. Level: C2
团队中缺乏积极性，需要解决。
In the team, motivation ___is ___lacking and needs to be addressed.
危机期间缺乏真正的领导力。
True leadership ___was ___lacking during the crisis.
有时，当我们最需要时，却缺乏最简单的解决方案。
Sometimes, the simplest solutions ___are ___lacking when we need them most.
