n.绝热材料；支拱板条
adj.落后的；慢的；迟缓的
动词lag的现在分词.
Worry about Brazil's lagging education system is becoming more widespread. 越来越多人已在担忧巴西落后的教育制度。
Under the lagging condition at that time, the American gentlemen set up a democratic system base on an agriculture country and carried forward. 在当时极其落后的条件下，美国的绅士们在一个基本上都是农民的农业国家建立民主制度，而且发扬光大。
v.造渣
adj.不疲倦的；不减弱的；不屈不挠的；不松弛的
涂料粘附
