infinity

詳細解釋：

in.fin.i.ty

n.（名詞）
【複數】 in.fin.i.ties 縮寫 inf.
The quality or condition of being infinite.
無限：無窮無盡的性質或者狀況
Unbounded space, time, or quantity.
無限的空間、時間或者數量
An indefinitely large number or amount.
無限大的數或量
Mathematics The limit that a function ô is said to approach atx = a when for x close to a, ô(x) is larger than any preassigned number.
【數學】 無窮大極限：函式ô在接近x = a 處的極限，當 x 接近 a, ô(x) 時大於任何預先給定的數

A range in relation to an optical system, such as a camera lens, representing distances great enough that light rays reflected from objects within the range may be regarded as parallel.
（聚焦區）無限遠：與光學系統（如照像鏡頭）有關的一個範圍，表示距離是如此之遠，以至於從在這一距離的物體上反射回來的光可以視為平行光線
A distance setting, as on a camera, beyond which the entire field is in focus.
無限遠標誌：一個距離的設定，比如在照像機上，表示整個場景都在焦點內