When watching TED to learn English, the main thing is to train your listening. However, through looking up single words, using documentary idioms, etc., your reading and writing skills will also be improved unknowingly.
When learning English while watching TED, the main focus is on training listening skills. But through word search, documentary language usage, etc., reading and writing skills can also be unconsciously improved.
When watching TED learn English, it is mainly to train listening. However, reading and writing skills will be improved unconsciously by looking up vocabulary and documentary language usage.