Why does the Torah find it necessary to insert "be'Eiver Yarden be'Eretz Mo'av"?
Seforno: Now that they had finished wandering in the desert 1 and Moshe had given up on his desire to enter the Land, he began to clarify issues that he thought might raise doubts in the people's minds.
Seforno: As this was their last stop before entering Eretz Cana'an.
What are the connotations of "Ho'il Moshe ... "?
What are the implications of "Be'er es ha'Torah he'Zos ... "?
Rashi: It means that Moshe began to explain the Torah in seventy languages. 1
Targum Onkelos: It means that 'Moshe began to explain the teachings of this Torah ... ".
Targum Yonasan: It means that 'Moshe began to teach the words of this Torah ... ".
See Sifsei Chachamim and Ba'al ha'Turim (27:8).
What are the connotations of the word "Leimor"?
Ramban: It refers to the Aseres ha'Dibros which the previous phrase is referring to.
Seforno: It refers to his (unwritten) message, explaining why it was necessary to repeat the Torah and clarify it - Refer to 1:5:1:1 - Because they were about to cross the Yarden, and he would not therefore be available to warn them in the event that they err or to resolve doubts should they arise. He also reminded them how his inability to cross the Yarden together with them was due to their sins, thereby encouraging them to be more careful in the future and not to sin again.