The decline started in the 1950s, when manufacturing generated a sturdy 28% of the national income, or gross domestic product, and employed one-third of the workforce.
出自-2013年6月阅读原文
柯林斯高阶英汉双解学习词典释义
ADJ-GRADED
坚固的;结实的;强壮的
Someone or something that is sturdy looks strong and is unlikely to be easily injured or damaged.