N a vent in or near a volcano from which hot gases, esp steam, are emitted 火山区的喷气孔
The “jet-type noise” of gas and ash rushing out of fumaroles was heard several kilometers away.
蒸汽和火山灰从火山喷气口涌出时发出飞机发动机样的（巨大）噪音，人们在数公里之外都能听见。
New fumaroles were observed, and several geysers showed enhanced activity and increasing water temperatures.
科学家们观测到了新的火山喷气孔，而且几个间歇喷泉增强了活性并提高了水温。
Or take a hike throughYangmingshan's many trails. The haunting landscape of steaming fumaroles is apopular spot for mainland tourists.
或徒步走过阳明山的小径阳明山的火山喷气口是一个非常受大陆游客欢迎的景点，这里景色迷人，观后久久萦绕于心，难以忘怀
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