1、night/evening
night指the time of darkness between evening and morning;而evening 指the time between sunset and bedtime.
2、know/learn/notice
know知道;熟悉 learn 听说;认识到;了解 notice 注意到
3、sound/cry/voice/shout/noise
sound 泛指各种声音 cry,voice,shout一般都指人的声音 noise 指噪音