Are these right?

"It was all pure white, rolling in gentle undulations where the ice jams of the freeze‑up had formed."
"Fifty degrees below zero stood for a bite of frost that hurt and that must be guarded against by the use of mittens, earflaps, warm moccasins, and thick socks. Fifty degrees below zero was to him just precisely fifty degrees below zero."

2 answers

Yes.
Thank you for helping me:)