'A doorsill, or a point that must be exceeded to begin producing a desired effect'
the threshold
OLD SCHOOL: A doorsill, or a point that must be exceeded to begin producing a desired effect
A doorsill, or a point that must be exceeded to begin producing a desired effect
A doorsill, or a point that must be exceeded to begin producing a desired effect
"OLD" SCHOOL
the threshold
"OLD" SCHOOL