With similar geology factors of controlling gas, the content of coalbed methane is controlled by effective stage of gas genetation and the rate of gas generation in this stage.

在其它控气地质因素相似的前提下，有效生气阶段和有效阶段生气率控制着煤层含气量的高低。

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However, an effective strategy, the management of drug-resistant TB is still in pilot stage.

然而，作为一项有效的策略，对耐药结核病的管理仍处于试验阶段。

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Early experiments also suggest that the discs are effective even against some late-stage forms of cancer in mice.

这些初期实验还表明植入的原片对于治疗某些晚期癌症的老鼠亦能奏效。

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