the subfreezing temperatures sent chills down my spine.
It means below freezing level.
It in symmetry with sentence a is what? What is a sentence with symmetry in it? This sentence with symmetry is symmetry with sentence this.
Who or what the sentence is about is the subject of the sentence.
The subject of a sentence is who or what that sentence is about.
yes
I am wearing my parka because the weather in Toronto has reached subfreezing temperatures this week.
the hurricane led to a subzero temperature in ohio
sub
It means below freezing level.
It forms sleet.
The middle syllable "free" is stressed (sub-FREE-zing).
Frostbite
Sleet
frost Bite
Salt is often put on the sidewalk during or after it snows. This is because salt lowers the freezing point of ice. This is often just enough to melt snow at subfreezing temperatures.
The humidity in winter is lower.
Not nearly as far as they can smell. They may have relatively poor eyesight, but their keen noses are the most sensitive of any land animal. A polar bear can smell blood from miles away in subfreezing air temperatures.