I allowed for large tolerances as it was clear before we began that many of the methods that we normally use in construction would have to be verified and confirmed during installation.
我允许在安装过程中有较大的误差，因为显然在我们开始施工前许多常规建筑方式必须被调整和确认。
2
Because of factory tolerances and the unitized construction common to today's cars, this is rarely, if ever, the case.