2 Identify the soil as a poorly graded gravel, GP, or as a poorly graded ,sand, SP, if it consists predominantly of one size (uniformly graded), or it has a wide range of sizes with some intermediate sizes obviously missing (gap or skip graded).

• 2如果土包含一个主要的粒径(均匀的级配)；或者有一个很宽的；一些中间粒径明显缺失的范围(间隙或跳跃的级配).