lack substance

• 家畜发育不足

lack substance的用法和样例：

例句

1. Many people experience dark eye circles due to lack of sleep.
   很多人都因睡眠不足有过黑眼圈。
2. This kind of medicine can deal with a lack of kidney Qi effectively, and is very suitable for patients.
   这服药专治精气不足，很适合病人服用。