second nature片语KK [ˋsɛkənd ˋnetʃɚ] /ˈsɛkənd ˈneɪtʃɚ/发音片语1第二天性、习惯成自然、本能After years of driving, changing gears is second nature to her.开了这么多年车,换档对她来说已经是习惯成自然。用这个字练口说→