a while back 不久以前,刚才

　　例句：A while back I read an interesting story in a parenting magazine.

　　不久之前我在一本教育杂志上读到一个很有趣的故事。

　　at birth 刚出生

　　例句：It is easy to see that in such a world, most of one’s lifetime income will be determined at birth.

　　在这样一个世界我们不难得出，一个人一生的收入基本上在出生的那一刻就决定的了。

　　at one time 1.曾经,一度 2.每次,一次

　　例句1：They had based on Greenland at one time.

　　他们一度曾在格林兰岛上建立基地。

　　例句2：This is the largest number of such planets ever announced at one time.

　　这是第一次在同一时间宣布发现数量如此多的星球。

　　emerge from 从...出来,出现;曾经一度遭到...

　　例句：But respect for diversity is something that has to emerge from within a culture.

　　而对文化多样性的尊重又必须从一个文化内部生长出来。

　　just now 刚才

　　例句：I guarantee that there is no difference in quality between the products we'll send you next month and what samples you saw just now.

　　我保证我方下个月将发送的产品和你们刚才所见到的样品在质量上不会有一丝一毫的差别。

　　the other day 前几天,最近

　　例句：But I did see it in the paper the other day and it caught my eye.

　　但有一天我还真地在报纸里看到了这个单词，它立刻就吸引了我的注意力。