“天下之事，不难于立法，而难于法之必行。”法律的生命力在于实施，法律的权威也在于实施，守法是法律实施和实现的基本途径。对守法的正确理解是()。
Scientists have obtained more evidence ___________ plastic is finding its way into the human body.
Unlike traditional gyms, app-backed gyms offer people ___________ options to exercise.
A university is an educational institution which _____ degrees and carries out research.