1. doing some activity I didn't expect her to have started working yet, but she was already (hard) at it when I arrived. My neighbors are always arguing, and they were at it again last night.
at it 例句
英汉例句
People always talk about the costs of therapy and granted it「s expensive but no one ever looks at it from a rational standpoint.
人们总是谈论心理治疗的价格,并一口咬定它高得离谱,但却从没有人以理智的观点来看这个问题。
He soon found a huge bear, shot at it but only wounded it.
他很快发现一只巨大的熊,向它开枪但只是把它击伤了。
I was trying to sell all over the US and all over the world, and everyone would look at it and think not interested, not interested, not interested.
You have to work at it and design it in to your systems from the beginning, just like you have to design in scalability, performance, reliability and security.