1 Because each project is site specific, its execution is influenced by natural, social and other locational conditions such as weather, labor supply, local building codes, etc.

• 因为每个项目都与特定的现场相关，他的实施都要受到自然的、社会的和其他当地条件的影响，如天气、劳动力供应、当地建筑规范等.