sheaf of differentials

例句：

1. 1. The farmer carefully shears the wheat into a neat sheaf.
   农民小心翼翼地将小麦剪成整齐的一束。
2. 2. The sheaf of grapes is ready to be picked.
   葡萄束准备被采摘了。
3. 3. She gathered up her sheaf of papers and headed home.
   她把一堆文件收拾好，回家了。