1.for example, where right now, if you turn up the gain of a hearing aid or turn up the volume to hear someone across from you, it also amplifies everything else in the room,
turn up 出现;发生;开大;发现;卷起;使仰卧
Richard had turned up on Christmas Eve with Tony.
理查德在圣诞前夜与托尼一起出现 。
Can you turn up the TV?
你能把电视机的声音调大点吗?