Lǎoshī / tíxǐng / wǒmen / shǐyòng / chángjǐngpíng / shí / yào / zhùyì / píngkǒu， / bìmiǎn / yètǐ / sǎ / chūlái。

老师提醒我们使用长颈瓶时要注意瓶口，避免液体洒出来。

The teacher reminded us to watch the neck of the flask to avoid spilling the liquid.