不将任何警告视为错误。
If there were no warnings during the previous API call, empty string is returned.
如果前一次API调用没有警告,返回空字符串。
Natural disasters and accidents happen with little or NO warnings.
自然灾害或事故往往在毫无先兆或很少预兆情况下发生。
Natural disasters and accidents happen with little or NO warnings.
自然灾害或事故往往在毫无先兆或很少预兆情况下发生。
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