1.The quality of medical care you receive from doctors could depend on the time of the day you visit a hospital or clinic.
depend on依靠;依赖
He was the sort of person you could depend on.
他是你可以信赖的人 。
2.A study from the University of Pennsylvania in the USA discovered a significant difference in the decision-making of physicians at different times of the day.
significant difference明显性差异
Even for this small problem, that's a significant difference.
即使对于这个小问题,这也是很显著的差异 。