Europa is covered in a shell of water ice that's thought to hide an ocean of liquid water below. Liquid water is a key ingredient for life as we know it.

木卫二由水冻冰层所覆盖，人们认为其下流动着大量的液态水，而正如人们所知，液态水是生命存在的重要因素。

youdao

Nut shell activated carbonis widely used in life, industry, liquid phase adsorption, water purification, gas adsorption;

果壳活性炭广泛应用于生活、工业、液相吸附、水质净化、气相吸附；

youdao

The failure mechanism of a roll shell in continuous roll casting is discussed and a formula for predicting its fatigue life is established.

分析了铸轧辊套的失效机理；提出了铸轧辊套疲劳寿命预报公式。

youdao

Mr Phillips said they were covered in dead plant and shell life which suggested they had been exposed before.

BBC: Rhossili beach looking towards Llangennith

McClaren sat shell-shocked in his dug-out as England looked to be throwing away the life-line handed to them by Israel after their win over Russia -- and they left the field at half-time to a chorus of boos.

CNN: Croatia crush England Euro dreams