“的部分”的英语？

下降的部分原因在于英镑对美元的升值。The drop was caused partly by the pound's strength against the dollar.我决定把这张照片水印以下的部分裁掉。I decided to crop the picture just above the water line.该公司租下了这栋大楼，占用了一部分并转租了其余的部分。The company rented the bui...