piecrust promise

• 脆弱的诺言

piecrust promise的用法和样例：

例句

1. You must live up to your promise.
   你必须实践自己的诺言。
2. He redeemed his promise at last.
   他终于履行了自己的诺言。
3. We are not satisfied with his brittle promise.
   我们对他所做的靠不住的诺言不满意。