in the upper of the cell

例句：

1. 1. The scientist placed a sample in the upper part of the container.
   科学家把样本放在容器的上部。
2. 2. The book is on the upper shelf of the library.
   这本书在图书馆的上层架上。
3. 3. The bird perched on the upper branch of the tree.
   那只鸟停在了树梢的上层枝上。