lǎo / shī / bǎ / zhè / ge / fù / zá / gài / niàn / lí / xī / chéng / jǐ / ge / bù / fèn / bāng / zhù / xué / shēng / zhú / yī / lǐ / jiě

老师把这个复杂概念离析成几个部分，帮助学生逐一理解。

The teacher broke down the complex concept into several parts to help the students understand them one by one.