1. They may marry, and sink to the humdrum of other old marry people. 他们可能结婚，然后陷于像那些老年夫妻一样的平凡。
2. They all appeared to be lost in the humdrum and routine of their work. 他们好象一个个都被埋在日常单调的工作当中了。
3. So humdrum was the technical work that it killed Wu Yu's patience. He hoped to be unique. He needed more space for himself. 单调、重复的技术工作让吴宇失去了耐心，他希望与众不同，他要创造更广阔的自我空间。
英英解释
n.
1. the quality of wearisome constancy, routine, and lack of variety
2. not challenging; dull and lacking excitement
3. tediously repetitious or lacking in variety
