原级：schoolbag
1. A passerby was suspicious of the schoolbags two students had left inside an art gallery in Beijing last Monday so he called police.
2. The drivers gave the children schoolbags and pencil cases, which they paid for out of their own pockets.
3. The political party weighed the schoolbags of 100 students in a public housing estate in Tsing Yi.
4. Earlier banners celebrating the city being awarded the Olympics were sewn into schoolbags for local children.
5. Local manufacturers recently introduced the small plaques and they've taken off among children and teenagers, who attach them to their cell phones and schoolbags.
6. Instead students are encouraged to put small items into their schoolbags or bring their own shopping bags.
7. Now if we let condom find its way into the children's schoolbags, it would amount to acquiescence to their puerile attempt at sexual life.