lǎo / shī / bǎ / zhè / ge / shí / yàn / fēn / bù / zhòu / jiǎng / jiě / dà / jiā / hěn / kuài / jiù / tīng / dǒng / le

老师把这个实验分步骤讲解，大家很快就听懂了。

The teacher explained the experiment one step at a time, and everyone soon understood it.