with one’s … stomach
他还饱着肚子呢
He’s still full.
— 完美陌生人 (2016)
害我们饿着肚子训练
They made us train on an empty stomach.
— I Am What I Am (2021)
就是老婆大着肚子我好久没那个了
It's just that my wife's been heavily pregnant, so I haven't had sex in a long time.
— 2046 (2004)
饿着肚子是没法打仗的。
You can’t fight a war on an empty stomach.