what kind of forms
什么样的形式？
以上为机器翻译结果，长、整句建议使用 人工翻译 。
"What we do know is that if you formulate it in the right way, it actually forms kind of the bedrock of the mining industry - it's a hugely used commercial explosive, " he told the BBC World Service.
BBC: Texas Waco fertiliser plant blast search for survivors
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