STEM与日常科技·英语30篇（2）

20 / 30

已读 0 / 30 课

气象雷达如何探测降雨强度与移动

Weather radar sends out microwave pulses that bounce off raindrops in the sky.
By measuring how much energy returns and how long it takes, computers calculate distance and intensity.
Larger or more numerous drops reflect stronger signals, showing heavy versus light rain.
Doppler radar also detects motion, so it can track storm movement and rotation speed.
Meteorologists combine data from many radars to build real-time national precipitation maps.
This helps issue flash flood warnings hours before heavy rain reaches cities.
Radar cannot see inside mountains, so gaps exist in terrain-heavy regions.
New dual-polarization radars send both horizontal and vertical pulses for better drop shape analysis.
They distinguish rain from hail, snow, or even birds flying near airports.
Though powerful, radar still needs ground sensors to confirm rainfall amounts accurately.

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

Radar cannot see inside mountains, so gaps exist in terrain-heavy regions. 雷达无法穿透山脉，因此地形复杂区域存在观测盲区。
Meteorologists combine data from many radars to build real-time national precipitation maps. 气象学家整合多个雷达的数据，生成实时全国降水图。
This helps issue flash flood warnings hours before heavy rain reaches cities. 这有助于在强降雨抵达城市前数小时发布山洪预警。

这篇中文题目最接近哪一句？气象雷达如何探测降雨强度与移动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？天气雷达发射微波脉冲，这些脉冲会从空中的雨滴上反射回来。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） How Weather Radar Detects Rain Intensity and Movement How to cook noodles A maths worksheet

Radar cannot see inside mountains, so gaps exist in terrain-heavy regions.

Radar cannot see inside mountains, so gaps exist in terrain-heavy regions.

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：Radar cannot see inside mountains, so gaps exist in terrain-heavy regions.