燃气灶开着。

The gas ___burner is on.

请把锅放在炉灶的右前火眼上。

Please place the pot on the front right ___burner of the stove.

工人们用燃烧器加热钢锭以便锻造。

The workers use a ___burner to heat the steel ingots for forging.

他用一次性手机给客户打电话，这样就不会留下记录。

He used a ___burner to call the client so there would be no record.