sheaf of multiplicative groups

例句：

1. 1. The farmer carefully shears the wheat into neat sheaves.
   农民小心翼翼地将小麦剪成整齐的捆。
2. 2. The grapes are ready to be picked and then hung in sheaves.
   葡萄已经准备好被采摘，然后挂在捆上。
3. 3. The sheaf of books on the shelf is too heavy for me to carry.
   书架上的书捆太重了，我搬不动。