STEM与日常科技·英语30篇（9）

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机场安检扫描仪如何显示彩色威胁提示

Airport scanners highlight metal items in blue and organic materials in orange.
Each color helps screeners quickly decide whether to inspect further.
Liquids appear as translucent amber shapes inside your carry-on bag.
The software compares item density and shape against a safety database.
If something looks unusual, the screen flashes yellow for closer review.
Passengers never see the full image — only authorized staff do.
Newer scanners use millimeter waves instead of X-rays for safer scanning.
You’ll hear a quiet tone when your bag clears without alerts.
Scanners update their threat library automatically overnight via secure Wi-Fi.
The color system works the same way whether you’re traveling alone or with kids.

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

Each color helps screeners quickly decide whether to inspect further. 每种颜色帮助安检员快速判断是否需要进一步检查。
Liquids appear as translucent amber shapes inside your carry-on bag. 液体在随身行李中呈现为半透明琥珀色形状。
Scanners update their threat library automatically overnight via secure Wi-Fi. 扫描仪每晚通过安全Wi-Fi自动更新威胁库。

这篇中文题目最接近哪一句？机场安检扫描仪如何显示彩色威胁提示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？机场扫描仪将金属物品标为蓝色，有机物标为橙色。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） What Makes Airport Security Scanners Show Color-Coded Threat Alerts How to cook noodles A maths worksheet

Each color helps screeners quickly decide whether to inspect further.

Each color helps screeners quickly decide whether to inspect further.

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：Each color helps screeners quickly decide whether to inspect further.