科学素养与生活应用·英语30篇（4）

20 / 30

已读 0 / 30 课

沙漠沙丘为何呈平行脊状排列：风力与颗粒动力学

Desert dunes often form long, parallel ridges aligned with the dominant wind direction.
This pattern emerges because steady winds sort sand grains by size and transport them consistently.
Larger grains roll along the surface while finer particles bounce or float briefly in air.
As wind slows over obstacles, sand deposits build up gradually into elongated ridges.
The spacing between ridges depends on wind speed, grain density, and surface roughness.
Satellite imaging reveals these patterns shift only millimeters per year under stable conditions.
Geologists use laser scanning to measure dune height changes during seasonal wind shifts.
Computer models simulate airflow turbulence to predict how new ridges form over decades.
Such alignment helps engineers design solar farms that minimize sand accumulation on panels.
Studying dune geometry also informs Mars rover navigation through extraterrestrial aeolian landscapes.

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

Studying dune geometry also informs Mars rover navigation through extraterrestrial aeolian landscapes. 研究沙丘几何形态也有助于火星车在地外风成地貌中导航。
Desert dunes often form long, parallel ridges aligned with the dominant wind direction. 沙漠沙丘常形成与主导风向平行的长条状脊线。
As wind slows over obstacles, sand deposits build up gradually into elongated ridges. 当风在障碍物后减速时，沙粒逐渐堆积成细长的脊线。

这篇中文题目最接近哪一句？沙漠沙丘为何呈平行脊状排列：风力与颗粒动力学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？沙漠沙丘常形成与主导风向平行的长条状脊线。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 Desert Sand Dunes Align in Parallel Ridges How to cook noodles A maths worksheet

Studying dune geometry also informs Mars rover navigation through extraterrestrial aeolian landscapes.

Studying dune geometry also informs Mars rover navigation through extraterrestrial aeolian landscapes.

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：Studying dune geometry also informs Mars rover navigation through extraterrestrial aeolian landscapes.