lǎo / shī / xiàng / wǒ / men / zhǎn / shì / le / mù / zhì / jiàn / gǎn / hé / jīn / shǔ / jiàn / tóu / de / qū / bié老师向我们展示了木制箭杆和金属箭头的区别。The teacher showed us the difference between a wooden arrow shaft and a metal arrowhead.