Making of Blue LED

Why It Was Almost Impossible to Make the Blue LED? on FB,11:58, by Veritasium

Why It Was Almost Impossible to Make the Blue LED? on YT,33:44, by Veritasium

The Evolution of Engineering Vocabulary in English (interactive version)

EX#5 

Supplement

科技英文的演進

• Timeline of English Language History (interactive version)  ( video )
• The Influence of Christianity on the English Language
• French Influence on the English Language (word pair games)

Domino

AD, Anno Domini

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