lack substance meaning in English

家畜发育不足

The commissioner tries to resolve complaints by conciliation . in some cases complaints may be dismissed if they lack substance
本委员会尝试通过协商解决投诉。在某些情况中，如果投诉缺少实质内容，可能被撤销。
The reasons of his flee sons ' indolence and tediocrity are : frist is love dearly and no education ; second is no press and standard so to lack of virtue and ability ; third is the lack substance support about learning
细究一下，陶家五子的懒惰丧志、平庸无为和陶渊明不无关系：一是五子无教有爱，失教于童蒙；二是失于督教、立范，诸子德艺不周；三是读书治学物质支撑的缺乏。
I did not think highly of it ; i thought it was within everyones capability to discuss educational issues , so i gave it a go . i spoke of the weighty schoolbags , meaning it as an allusion to the pressure imposed by our education system on the students . but my remarks lacked substance and proved only to be a poor imitation
我尝试模仿过很多议员，不过，请大家不要太认真，当作废语听听就好了，请大家不要见笑第一个是张文光议员，最初觉得张文光议员口才了得，出口成文，说过的话，第二天就成为新闻，我觉得他没有甚么了不起，讨论教育问题人人都懂得，于是我又讨论一下。