2
1
0
117 years ago #Today, this sequence of characters was specified as the international distress signal
In International Morse Code, three dots form the letter "S" and three dashes make the letter "O", so "S O S" became a common way to remember the order of the dots and dashes.…
有趣
(
twitter.com
)
由
Massimo
提交
117 years ago #Today, this sequence of characters was specified as the international distress signal
In International Morse Code, three dots form the letter "S" and three dashes make the letter "O", so "S O S" became a common way to remember the order of the dots and dashes.
"S O S" being readable upside down as well as right side up (as an ambigram) is an advantage for visual recognition especially from above.
点击图片查看原图
Markdown支持
评论加载中...
您可能感兴趣的：
更多
1
2
1
1
3
3
2
2
4
2
1
1
5
2
1
1
6
2
1
1
7
2
1
1
8
2
1
1
9
2
1
1
