With similar geology factors of controlling gas, the content of coalbed methane is controlled by effectivestage 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。
2
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。
3
Early experiments also suggest that the discs are effective even against some late-stage forms of cancer in mice.