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Why Do Geysers Erupt at Regular Intervals?
为什么间歇泉会以固定间隔喷发？
精读先不看文字，完整听一遍。
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Geysers erupt when underground water heats up, turns to steam, and builds pressure beneath a narrow rock channel.间歇泉喷发是因为地下水流受热变成蒸汽，并在狭窄的岩石通道下方积聚压力。
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The timing depends on how quickly heat flows from magma below and how much water refills the chamber after each blast.喷发时间取决于下方岩浆传热的速度，以及每次喷发后有多少水重新注入蓄水腔。
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A constriction in the pipe traps steam until pressure becomes strong enough to lift the water column above it.管道中的狭窄处会困住蒸汽，直到压力大到足以顶起上方的水柱。
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Once the seal breaks, steam rushes upward, pushing water out in a powerful, hot explosion.一旦密封被冲破，蒸汽便急速上升，将水以强劲而炽热的爆炸形式推出。
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Afterward, cool groundwater slowly seeps back in, restarting the heating cycle all over again.随后，较冷的地下水缓慢渗入，重新启动整个加热循环。
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Scientists measure eruption intervals using sensors that track temperature, pressure, and ground movement.科学家利用传感器测量温度、压力和地面运动来记录喷发间隔。
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No two geysers behave exactly alike because each has unique underground plumbing and heat sources.没有两座间歇泉行为完全相同，因为每座都有独特的地下管道结构和热源。
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Old Faithful stays predictable thanks to stable geology—but climate change may alter its timing in coming decades.老忠实间歇泉因地质稳定而保持规律，但气候变化可能在未来几十年改变其喷发节奏。
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This natural clockwork reminds us that Earth’s interior constantly moves energy toward the surface.这种自然钟表提醒我们，地球内部持续不断地将能量向地表输送。
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Understanding geyser rhythms helps geologists monitor volcanic activity safely and remotely.理解间歇泉的节律有助于地质学家安全、远程地监测火山活动。
精读 · 大约 10 分钟
听 → 读 → 学表达 → 懂 → 今天会说这一句 → 跟读录音 → 自己说一句。
③ 学 · 重点表达
- Understanding geyser rhythms helps geologists monitor volcanic activity safely and remotely. 理解间歇泉的节律有助于地质学家安全、远程地监测火山活动。
- Scientists measure eruption intervals using sensors that track temperature, pressure, and ground movement. 科学家利用传感器测量温度、压力和地面运动来记录喷发间隔。
- Afterward, cool groundwater slowly seeps back in, restarting the heating cycle all over again. 随后，较冷的地下水缓慢渗入，重新启动整个加热循环。
④ 懂 · 选一选
⑤ 今天会说这一句
Understanding geyser rhythms helps geologists monitor volcanic activity safely and remotely.
⑥ 跟读并录音
Understanding geyser rhythms helps geologists monitor volcanic activity safely and remotely.
第一版：录下来、回听、再听标准音。系统打分以后再加。
⑦ 说 · 自己来一句
用今天的表达，自己说一句。
例子：Understanding geyser rhythms helps geologists monitor volcanic activity safely and remotely.
已记下。连续天数以后会显示在课表里。
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