The Convention Against Torture defines torture as any act that inflicts severe pain or suffering, physical or mental.

《反酷刑条约》把酷刑定义为任何造成严重身心疼痛和受苦的行为。

I felt a severe pain in the chest.

我感到胸口剧烈疼痛。

He felt a severe pain in his left leg.

他感到左腿一阵剧痛。

I've got a severe pain in my left side.

我的左半边身体非常疼。

She has a disease attended with severe pain.

她患的病带有剧烈的疼痛。