1. With bright beady eyes, they glanced shyly at each other, sniggering a little, sniffing and applying coat-sleeves a good deal. 他们睁着明亮的小圆眼睛,害羞地互相瞥了一眼,窃笑了一下,嗅了嗅,又把外套袖子擦了好多遍。
2. What are you sniggering at? 你偷偷笑什么呢?
3. Suddenly, three schoolkids sitting near me started sniggering. 突然,坐在我身边的3个学童偷偷地笑了起来。