lǎo / shī / yòng / yí / dào / lì / tí / xiáng / xì / jiǎng / jiě / le / Luó / bì / dá / fǎ / zé / de / shì / yòng / tiáo / jiàn

老师用一道例题详细讲解了罗必达法则的适用条件。

The teacher explained in detail the conditions for applying L'Hôpital's rule using an example.