<p>even t
hough there is plenty of evidence that the quality of the teachers is the most important variable, teachers’ unions have fought against getting rid of bad ones and promoting good ones.</p><p>词汇打破</p><p>variable [?veri?bl]</p><p>adj. 变量的；可变的；易变的，多变的；变异的，[生物] 畸变的</p><p>n. [数] 变量；可变物，可变要素</p><p>promote [pr??mo?t]</p><p>vt. 推进；前进；推销；发扬</p><p>规划分析</p><p>语句的骨干是 teachers’ unions have fought against getting rid of bad ones and promoting good ones。句首 even though 引导一个让步状语从句，标明转机，that 引导一个同位语从句，说明阐明 evidence。</p><p>参阅译文</p><p>即便有许多根据标明，教师的本质是(影响教育水平的)最重要变量，教师工会仍一向对立开除 差的教师，前进好的教师的做法。</p>