1. The largest, oldest trees would progressively die off and tend not to be replaced. 最大、最老的树会逐渐死去，并且往往不会被取代。
2. As a day-to-day essential, it will die off with the generation who read print newspapers. 作为一种日常必需品，它将随着阅读纸质报纸的一代人而消亡。
3. Contraction of front and side parts as cells die off was observed in some subjects in their thirties, but it was still not evident in some sixty and seventy-year-olds. 随着细胞的死亡，有些人大脑前部和侧部的收缩，在三十多岁时就能观察到，但是也有些人直到六七十岁依然不明显。
4. There have been reports of poultry die off in her village. 有报道称，病人所在的村庄有家禽死亡情况。
5. Without the gel, scientists say, the bacteria die off. 科学家说，如果没有这种凝胶，细菌将无法存活。
