Hold down Cmd + Opt + click on the triangle icon will collapse or expand all level layer groups.
按下Cmd和Opt键的同时击这个三角形符号，可以折叠或展开所有层级的群组文件夹。
2
Color ring and a level section of A. H. Munsell color solid were analysed with regular triangle. Schemes for trigonal color design suitable for furniture design were suggested.
通过正三角形分析色环及孟赛尔色立体水平剖面，寻找三角色设计的配色方法，并应用于家具设计中。
3
Based on the triangle truncation at wavenumber 10, a study is made of the topographic influence on the intra—seasonal oscillation (ISO) in terms of a 5—level low—order global spectral model.