但是昏暗的光线是否真的会导致永久性的视力下降呢？

But does the amount of light we read by really matter?

youdao

随着时间的推移，数据库的性能是否在明显的下降呢？

Is there evidence that the database performance has degraded over time?

youdao

随着时间的推移，数据库的性能是否在明显的下降呢？

Is there evidence that the database performance has degraded over time?

youdao