1. While Sussman was neat and serious about studying, his roommate was messy and liked to party into the early hours of the morning.
    "萨斯曼喜欢整洁，学习认真，而他的室友却邋里邋遢，而且喜欢通宵聚会直至凌晨。

2. He keeps his room clean and neat.
    他使房间保持清洁和整齐。

3. He has made neat paths and has built a wooden bridge over a pool.
    他修筑了一条条整洁的小路，并在一个池塘上架了一座小木桥。