b)to stop worrying or thinking too much about something 放开某事
It’s time to let the past go.
该忘掉过去了。
c)informal to sell something for a particular amount 〔以某价钱〕卖掉某物
let something go for £20/$200 etc
I couldn’t let it go for less than £300.
少于300英镑我是不会卖的。
Examples from the Corpus
let something go• I've nowhere to store all this china, so I'm letting the whole lot go for $50.• They've held the world record for many years, and they're not going to let it go without a fight.