extremely

1. ADV You use extremely in front of adjectives and adverbs to emphasize that the specified quality is present to a very great degree. 極耑地; 極度地[ADV adj/adv] [強(qiáng)調(diào)]

My mobile phone is extremely useful. 我的手機(jī)極爲(wèi)有用。

Three of them are working extremely well. 他們中的3個(gè)人工作極其出色。