Application to simple engineering structures such as rods, shafts, beams, and trusses. 在简单工程学架构的应用，比如标尺，轴，横梁和构架支撑。
By cooperating in specific areas through the United Nations,States build the structures that make international life possible. 各国通过联合国在具体领域合作，建设能规范国际生活的构架。
