First Marconi sent the Morse codeletter s a distance of 300 feet.
马可尼首先将摩尔斯码的字母s发送了300英尺远。
2
Phonics provides children with a code: pupils learn individual letter sounds and then learn how letters work in groups.
拼读法为孩子们提供了一套规则：学生们学习单个字母的发音，然后学习这些字母组合在一起时如何发音。
3
The small xx represents the local language, which is a two letter ISO-639 language code and the capital XX represents the local country, which is a two letter ISO-3166 country code.
小写的xx 表示本地语言，它是一个 ISO-639 语言编代码，为两个字母；大写的 XX 表示本地国家，它是一个 ISO-3166 国家代码，为两个字母。