21.   Justice Department attorney Seth Waxman said that parents cannot rely on existing screening software to guard against inappropriate material being accessed by children.

a. + material >>共 922
nuclear 4.99%
radioactive 4.13%
building 4.10%
new 3.77%
hazardous 3.53%
genetic 2.61%
bomb-making 1.24%
explosive 1.07%
reading 1.07%
educational 1.05%
inappropriate 0.18%
inappropriate + n. >>共 242
behavior 11.79%
use 3.98%
relationship 3.68%
contact 3.22%
material 3.22%
time 2.45%
comment 2.45%
remark 1.99%
conduct 1.99%
treatment 1.84%
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