They lack water-storing structures, and their existence on rock faces prevents them from tapping groundwater, so they have instead developed the ability to change their metabolism.

它们缺乏储水结构，而且它们长在岩石表面，这阻止了它们利用地下水，所以它们反而形成了改变新陈代谢的能力。

youdao

They may even lack sufficient water for basic hygiene - to wash themselves and their clothes, and to prevent infection including from foodborne and waterborne diseases.

他们甚至可能缺乏充足的水用于基本卫生—洗澡和洗衣服，以及预防包括由食源性和水源性疾病造成的感染。

youdao

However, under the severe cold weather, evacuees are having a very difficult time because they lack food, water, and energy sources," he said.

尽管，这种非常糟糕的天气状况使撤离非常的困难，因为他们没有食物，没有水，也没有足够的能源。

youdao

There is a lack of regular running water in several areas, while doctors at the local hospital admit they do not always provide blood to patients that is tested for the HIV virus that causes AIDS.

VOA: standard.2010.02.14

Instead, they share communal portable toilets, and lack running water and electricity.

ECONOMIST: South Africa

They lack medical care, adequate food, warmth and clean water.

CNN: STORY HIGHLIGHTS

They need to guard against the wind, sun, and lack of water among other forces.

FORBES: Creative Leadership: Introspection