1 . Scientists in Antarctica have recorded, for the first time, unusually warm water beneath a glacier (冰川) the size of Florida that is already melting and contributing to a _______ in sea levels.

The researchers, _______ on the Thwaites Glacier，recorded water temperatures at the base of the ice of more than 2 degrees Celsius, _______ the normal freezing point.

It is _______ how fast the glacier is deteriorating (恶化): Studies have forecast its total collapse in a century and also in a few decades. The presence of _______ water in the grounding line may support estimates at the faster range.

That is _______ because the Thwaites, along with the Pine Island Glacier, _______ as a brake (阻力) on part of the much larger West Antarctic Ice Sheet. Together, the two bigger glaciers are currently _______ ice that, if melted, would raise the world’s oceans by _______ than a meter over centuries, an amount that would put many coastal cities under water.

“Warm waters in this part of the world, as ________ as they may seem, should serve as a ________ to all of us about the potential dire (非常糟糕的) changes to the planet ________ out by climate change,” said David Holland, a lead ________ on the expedition.

While scientists may not yet be able to definitively ________ how soon glaciers like the Thwaites will melt, human-caused climate change is a key ________. The biggest predictor of “how much ice we will lose and how quickly we will lose it,” Dr. Moon said, “is human action.”