Picoline is the by-product in the preparation of diphenylamine with aniline.
甲基吡啶是苯胺连续缩合合成
苯胺的副
。
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Grade inflation - the gradual increase in average GPAs (grade-point averages) over the past few decades - is often considered a product of a consumer era in higher education, in which students are treated like customers to be pleased.
分数膨胀——即过去几十年来,平均 GPA(绩点)的逐渐提高,这通常被认为是高等教育消费时代的
,在该时代,学生就是消费者,需要被满足。
Those reservations fell by the wayside as a wave of anti-Mexican animus, triggered by an economic recession, led the Immigration and Naturalization Service to adopt a highly militarized approach to immigration law enforcement, with Operation Wetback at its center.
然而,一场经济衰退引发了反墨西哥敌

,继而导致
民归化局开始采取高度军事化的
民执法方针,“湿背客行动”就是这一方针的核心
,
前的保留政策便纷纷被弃置一旁。