1.cool one's heels 久等
Do not make your guests cool their heels when you have appointments with them.
同客人订了约会就不要让人家久等nlftpo@k6!y。

2.worst of all 最糟糕的是
And worst of all, his wife was from a good family, her father was one of the pillars of the exchange market and his revenge would be great.
最糟糕的是，他的妻子是名门出身的大家闺秀，她父亲是交易市场的栋梁人物，倘若兴师问罪起来，那可了不得+3ctIBxa-_~。

3.be done doing sth. 结束；不再；……够了
We were done waiting for you.
我们等你已经等够了EU)a4]nrcD。

4.be open to (doing) sth. 对……持开放态度
You should really try to be more open to suggestions if you want to create the best product possible.
要想做出最好的产品，你就应该试着广纳建言C!DW*lb.edbIWM|&H。