Children run faster than adults.
Children are often faster than adults on foot.
Older adults start to slowdown compared to children.
The first one is more like
Kodomo ha otona yori hayai has hurry
The second one
Kodomo ha otona yori hayai desu
The third one
Otona ha toshi ue naru no toki osoku narimasu (kodomo toki yori)
Children heal faster than adults.
Kodomo ha otona yori Karuta ga yoku narimasu no onnaji imi desu ka
ごめんなさい
わかりません
Heal = repair (living things heal)
Repair for objects like a table.
Children heal (repair damage to their bodies) faster then adults.
定着→fixing