in the absence – phrases

English	Chinese
In the absence of oxygen, the substance in the container cannot bum well	没有氧气、容器里的物质不能充分燃烧
The blasting industry has had to rely on empirical approaches in the absence of a proven mechanistic fragmentation model	因为缺乏成熟的机械破碎模型、爆破行业只好依赖经验方法