zài / lì shǐ / kè / shàng / lǎo shī / jiǎng dào / hǎi lù jūn / zài / xiàn dài / zhàn zhēng / zhōng / de / zuò yòng

在历史课上，老师讲到海陆军在现代战争中的作用。

In history class, the teacher talked about the role of the navy and army in modern warfare.