1)
What is the request "v'Lo Nasog Mimeka"?
1.
Rashi: Do not cause us to go back from You (Radak - from Your Avodah; Malbim - from Emunah in You).
2)
What is the request "Techayeinu"?
1.
Rashi: Revive (redeem) us from the Galus (Radak - it is like death).
2.
Malbim: Keep us alive during these afflictions, in order that we will call in Your name.
3)
Why does it say "uv'Shimcha Nikra"?
1.
Rashi: After You redeem us from the Galus, we will mention Your good and Gevurah.
2.
Radak: We will be called on Your name, for You are our redeemer.
