Subject + 不禁 + Verb
不禁 (bùjīn) means "cannot help but" or "cannot refrain from," indicating an involuntary reaction or feeling. It is a literary adverb used before verbs to show that the action happens spontaneously and beyond one's control. For example, 不禁联想到 means "cannot help but think of."
看到这张老照片,她不禁流下了眼泪。
Kàndào zhè zhāng lǎo zhàopiàn, tā bùjīn liúxià le yǎnlèi.
Seeing this old photograph, she couldn't help but shed tears.
听到这个好消息,大家不禁鼓起掌来。
Tīngdào zhège hǎo xiāoxi, dàjiā bùjīn gǔqǐ zhǎng lái.
Upon hearing the good news, everyone couldn't help but start clapping.
走在古老的街道上,我不禁想起了小时候的生活。
Zǒu zài gǔlǎo de jiēdào shàng, wǒ bùjīn xiǎngqǐ le xiǎoshíhou de shēnghuó.
Walking along the old streets, I couldn't help but think of my childhood life.