lǎoshī shàngkè jǔ le gè tiējìn shēnghuó de ànlì, dàjiā yīxiàzi jiù tīng dǒng le

老师上课举了个贴近生活的案例，大家一下子就听懂了。

The teacher gave a real-life example in class, and everyone understood it right away.