这一集详细解释了课文中出现的部分单词，对这些单词进行单词变形，构成联想记忆，拓宽词汇量：luxurious, excursion, coach, ecotourism, consciousness, declare, absorb。近义词辨析区别了conservation, preservation和reserve的不同用法。 This episode explains some of the words as follows from the textbook, enhancing memory and broadening vocabulary by word formation: luxurious, excursion, coach, ecotourism, consciousness, declare, absorb. In the part of synonym analysis, differences among conservation, preservation and reserve are elaborated.