class boundary

基本解释

That this tactic is morally, rather than academically, motivated is made very clear by the fact that there is no corresponding border region just above the class boundary;
這種措施是出於道德而不是學術的考慮，可以確定的事實是，在分數線以上竝不存在這樣類似的“邊界區域”；
According to uniqueness theorem, the integral formulations of the first class boundary condition and the second class boundary condition are given form the above integral formulation.
根據邊值問題的唯一性原理，由此積分解表達式給出了第一類和第二類邊界條件的積分解表達式。
Some universities, for example, identify a "border region" of marks just below a class boundary in which a board of examiners is permitted to move a student up to the next degree class.
比如說，一些大學會定義一個略低於分級分數線的“邊界區域”，允許該分數領域內的學生陞級進入分數線兩側高一級的档次。