1)
Why did Mosheh need to repeat what the people said they saw and heard?
1.
Hashem came to give the Torah, Yisrael made two requests: 1. to see His Kavod and 2. to hear His Voice. 1 . Now that Hashem had fulfilled their requests, they asked Moshe to take over and to act as the intermediary between them and Hashem.
1
See Oznayim la'Torah, who elaborates.
2)
"Hein Her'anu Hashem Elokeinu es Kevodo". What are the connotation of "Kevodo", "Gadlo", and "Kolo"?
1.
R. Bachye: "Kevodo" refers to the appearance of fire, "Gadlo", to the lightning, the voices and the ssond of the Shofar, and and "Kolo", to the Aseres ha'Dibros.
