在火星上有大量的冰块,但是当水结冰时,形成生命的化学反应就会停止。
There is plenty of ice on Mars, but the chemical reactions for life come to a halt when water freezes.
当彗星或者其他小行星携带的水着陆在阳光明媚的坑点时,水直接气化。如果落在背阴一面,水就会结冰,不清楚什么时候解冻。
When water lands in sunny spots, perhaps carried by comets or asteroids, the water transforms directly into gas; if it lands in shadow, the water freezes and can remain indefinitely.
当温度计降至摄氏零度时,水便会结冰。
When the thermometer is at 0 degree centigrade, water will freeze.
当温度下降至摄氏零度以下时,水会结冰。
The water can freeze when the temperature descends below the centigrade zero.
当温度计降至零下时,水就会结冰。
当温度达到0摄氏度时,水会结冰。
当温度达到0摄氏度时,水会结冰。
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