STEM与日常科技·英语30篇（6）

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为何外观相似的云朵有的降雨、有的却始终干燥

Rain formation requires cloud droplets to grow large enough to overcome updrafts and fall as precipitation.
Collision-coalescence dominates in warm clouds, where larger droplets absorb smaller ones during turbulent mixing.
In cold clouds, the Bergeron process prevails: ice crystals grow at the expense of supercooled water droplets.
Scientists use Doppler radar to detect vertical air motion and particle phase inside clouds remotely.
Aerosol concentration determines initial droplet count—too many tiny droplets inhibit growth to raindrop size.
Cloud base height and temperature profile affect whether freezing nuclei trigger ice formation early in development.
Satellite-derived microphysical data help refine weather models predicting drizzle versus downpour intensity.
Even visually identical cumulus clouds may differ internally in droplet distribution and updraft velocity.
Field campaigns deploy instrumented aircraft to sample cloud chemistry and ice nucleation activity directly.
Understanding these variables improves flood forecasting and reveals how pollution subtly reshapes regional hydrology.

听 → 读 → 学表达 → 懂 → 今天会说这一句 → 跟读录音 → 自己说一句。

Satellite-derived microphysical data help refine weather models predicting drizzle versus downpour intensity. 卫星反演的云微物理数据有助于改进天气模型，提升毛毛雨与暴雨强度的预测精度。
Collision-coalescence dominates in warm clouds, where larger droplets absorb smaller ones during turbulent mixing. 在暖云中，碰并增长过程占主导地位：较大的云滴在湍流混合中吸收较小的云滴。
Aerosol concentration determines initial droplet count—too many tiny droplets inhibit growth to raindrop size. 气溶胶浓度决定初始云滴数量——过多微小云滴会抑制其增长至雨滴尺寸。

这篇中文题目最接近哪一句？为何外观相似的云朵有的降雨、有的却始终干燥一次学校运动会的通知一份超市购物清单

课文第一句的意思更接近？降雨形成需要云滴增长到足以克服上升气流并以降水形式下落。今天学校放假了。请把窗户打开。

这一课主要在讲什么？（看英文标题） Why Some Clouds Produce Rain While Others Stay Dry Despite Similar Appearance How to cook noodles A maths worksheet

Satellite-derived microphysical data help refine weather models predicting drizzle versus downpour intensity.

Satellite-derived microphysical data help refine weather models predicting drizzle versus downpour intensity.

第一版：录下来、回听、再听标准音。系统打分以后再加。

用今天的表达，自己说一句。

例子：Satellite-derived microphysical data help refine weather models predicting drizzle versus downpour intensity.