system languageun.系統語言系統語言設定；選擇系統語言；系統式語言例句1.will always retrieve the german resources , even if the users system language is set to french.將總是檢索德語資源，即使使用者的系統語言設定為法語。

2.The state of each disorder and order co-build "inner-stable" of social language system.這種無序與有序狀態構成社會語言系統的“內穩態”。

3.If it isn't suitably controlled, it will bring more noises to the healthy development of the language system.若不注意控制這種言語文風，將對語言體系的健康發展產生過多的噪音。4.Allusions are a unique branch of language system that concentrates the distillate of culture which has been formed in the long history.典故語是語言系統中的一支奇葩，它是漫長曆史長河中形成的文化的精華的提煉。5.Language and its ecology circumstance compose the eco-language system; the system is in a dynamic balance as others.語言與其所處的生態環境構成生態語言系統，生態語言系統與其他系統一樣處於動態的平衡之中。

using System的意思是引用名稱為System的名稱空間。using是C# 語言中定義一個範圍,將在此範圍之外釋放一個或多個物件。 名稱空間是用來組織和重用程式碼的。