piecrust pledge

• 脆弱的诺言,靠不住的诺言

piecrust pledge的用法和样例：

例句

1. I pledge myself to fulfil the promise I have made.
   我保证实践自己的诺言。
2. By invading the neutral nation, the dictator contravened his earlier pledge to guarantee its independence.
   独裁者入侵了那个中立国，违反了他早先保证该国独立的诺言。