a group of soldiers or workers can only fight or function effectively if they have been well fed
给养充足的士兵（或工人）才能很好地战斗（或工作）
after having eaten (or having not eaten)
饱（或空）着肚子
I think better on a full stomach.
我吃饱了才能更好地思考。
an ability to see or do unpleasant things without feeling sick or squeamish
（看或做讨厌的事时）坚强的性格