zuò / zhě / yòng / nǐ / shēng / miáo / xiě / yǔ / shuǐ / dǎ / zài / chuāng / hu / shàng / de / shēng / yīn作者用拟声描写雨水打在窗户上的声音。The author uses onomatopoeia to describe the sound of rain hitting the window.