Sarah was laughing because she was surprised and happy. This can be made explicit. AT: "God has caused me to laugh joyfully" (See: [[rc://en/ta/man/translate/figs-explicit]])
What people would hear can be stated explicitly. AT: "everyone who hears about what God has done for me" (See: [[rc://en/ta/man/translate/figs-explicit]])
This rhetorical question can be translated as a statement. AT: "No one would have ever said to Abraham that Sarah will nurse children" (See: [[rc://en/ta/man/translate/figs-rquestion]])