turn down：
英 [tə:n daun] 美 [tɚn daʊn]
拒绝;减少，关小;驳回;顶回去。
例句解析：
1 PHRASAL VERB 拒绝(某人或其请求、提议等) If you turn down a person or their request or offer, you refuse their request or offer.
Before this I'd have smiled and turned her down...
在这之前，我本该笑着拒绝她。
2 PHRASAL VERB 关小;调低 When you turn down a radio, heater, or other piece of equipment, you reduce the amount of sound or heat being produced, by adjusting the controls.
He kept turning the central heating down...
他不断调低中央暖气的温度。
3 PHRASAL VERB （比率）减少;（水平）降低 If the rate or level of somethingturns down, it decreases.
The divorce rate turned down in the 1950s.
20 世纪 50 年代离婚率下降了。