棉花: cotton...
特殊: special, particular, unusual, extraordinary...
彩虹: rainbow...
试卷: examination paper, test paper...
节俭: frugal, economical...
坦率: frank (discussion), blunt, open...
木材: wood...
希望: to wish for, to desire, hope...
堆积: to pile up, to heap, accumulation...
讲究: to pay particular attention to, carefully selected for quality, tastefully chosen...
