2.Students are listening with undivided attention.
学生们正在专地听讲。
3.I’ll just finish writing this sentence, and then you can have my undivided attention.
让我先把这句话写完,我就可以呼你了。
4.Glutamic acid fermentation is a kind of biochemistry fermentation engineering.Its selectivity is undivided comparatively.It is oxybiotic fermentation and is strict to air quality.