一言为定: that's settled then.; a promise is a promise.; count it as settled; it's a deal [whack].; once and for all; shake hands on sth.; take someone at his word; that's a bargain [whack]
决不: definitely not; certainly not; under no circumstances; by no means 短语和例子决不同意 definitely [certainly] will not agree; 决不退让 will under no circumstances give in
决不食言: never to retract one's words; i certainly will not retract my words.; never to break one's promise; never to go back on one's word; on no account to go back on one's promise
决不宽贷: no mercy will be shown.; no pardon will be given.; on no account will leniency be shown
