由于极地的温度和气候变化最为剧烈，所以企鹅的数量也会随之剧烈起伏，它们也因此成为气候变化的风向标。
Because the poles reflect changes in temperature and climate more dramatically than anywhere else, penguin populations also rise and fall dramatically, making them ideal indicators of climate change.
超高功率电弧炉出钢口在使用过程中要经受钢液的冲刷、渣液的侵蚀、氧化和温度的剧烈变化。
The taphole of UHP-EAF should stand severe molten steel corrosion, slag erosion, oxidation and temperature change during operation.
这种蜃像效应，在大气分层的温度造成大气密度剧烈变化时最为显著。
The effects are most pronounced when temperature layers in the atmosphere produce sharp changes in air density and refractive index.
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