1ADJ-GRADED [usually ADJ n]重要的;事关重大的 If you describe something such as an issue or a decision as weighty, you mean that it is serious or important. 重要的;事关重大的 [formal]
Surely such weighty matters merit a higher level of debate?
2ADJ-GRADED (尤指书)重的,沉甸甸的 You use weighty to describe something, especially a book, that is heavy or heavier than you would expect. (尤指书)重的,沉甸甸的 [literary]