What does this statement from the Execution Governors and Limits document mean?
In a SOQL query with parent-child relationship subqueries, each parent-child relationship counts as an extra query. These types of queries have a limit of three times the number for top-level queries. The row counts from these relationship queries contribute to the row counts of the overall code execution.
List<Trail__c> records = [select Id,(select Id,type,Industry from Accounts__r) from trail__c]
but it shows only one query fired in