/,nɒnəb'zɜ:vəns; ,nɑnəb`zɝvəns/
n [U] (fml 文) failure to keep or observe (a rule, custom, etc) 不遵从, 违反（规则、习俗等）
*accused of non-observance of the test-ban agreement 被控违反禁止核试验协定.