1.Life was a dark, insoluble mystery, but whatever it was, strength and weakness were its two constituents.
人生是玄妙的，不可分解的秘密，但是不管怎么样，强和弱就是它的两种组织成分。
2.First, you have to know your strength and weakness.
首先，你要了解自己的强项和弱项。
3.What are the organization's major strength and weakness?
公司的主要优势和薄弱环节各是什么？
