The trace Rh was concentrated with minified nickel sulfide fire assay before it was determined.

测定之前，痕量铑用小硫化镍试金富集分离。

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In 1924, the hall was threatened with destruction when a fire broke out on the roof. A good deal of the wall had to be torn down in an endeavor to trace the source of the fire.

1924年一场大火险些毁掉马萨诸塞堂，为竭力找寻起火源头，大堂墙体的一大部分都不得不被拆除了。

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It leaves no trace after fire extinguishing. It replaces for alkylogen annihilator.

灭火后不留痕迹，是取代卤代烷灭火器的替代品。

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Police have released CCTV images of a man they want to trace over two fire attacks in East Renfrewshire.

BBC: Fire attack suspect shown on CCTV in Barrhead

In Bristol the company can trace its routes back centuries to Royal Fire Insurance.

BBC: Insurance firm to shed 500 jobs

This fire was just too thorough, leaving very little trace of any cause.

NPR: 'Arson' by Nick Lysohir