- 1
/ˈθreʃhoʊld/ · /ˈθreʃhəʊld/
A threshold is the piece of floor right at the bottom of a doorway, the part you step over to go into a room or building. People often say 'cross the threshold' to mean walking into a new place. The word is also used for a point where something starts to happen or change. For example, your 'pain threshold' is how much pain you can take before it becomes too much, and a 'threshold' in a rule might mean the smallest amount needed before something applies, like 'you must earn above this threshold to pay tax.'
門檻（實際的門檻，也用於「標準/界線」，如痛覺門檻、稅務門檻）
複數 thresholds
組成Comes from Old English; the exact original meaning of its pieces is not fully agreed on by word historians, so it's best not to guess.
原始詞典資料8 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
thresholdnoun/ˈθɹeʃəʊld/
- 1
The lowermost part of a doorway that one crosses to enter; a sill.
- Near-synonym: doorstep
- 2
An entrance; the door or gate of a house.
- Shy. You that did voide your rume vpon my beard, / And foote me as you ſpurne a ſtranger curre / Ouer your threſhold, […]
- 3
Any end or boundary.
- 4
The outset of something; the point of entry, or the beginning of an action.
- on the threshold of maturity
- I arrived at last, did obeisance to my uncle, and told him everything. He thought it over and said: ' […] At the threshold of death, how dare I give you permission to go to England, to cross the seas? But I will not stand in your way. It is your mother's permission which really matters. If she permit you, then godspeed! Tell her I will not interfere. You will go with my blessings.'
- 5
aeronauticsaerospaceaviationThe start of the landing area of a runway.
- 6
engineeringnatural-sciencesphysical-sciencesThe quantitative point at which an action is triggered, especially a lower limit.
- 7
The wage or salary at which income tax becomes due.
- 8
The point where one is mentally or physically vulnerable in response to a provocation or to other nuisances.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。