at it

基本解釋

I fiddled at it all the time.
我一直在忙于那件工作。
He will get on to calculus as he keeps on working at it.
他會(huì)掌握微積分的，因?yàn)樗恢痹跍亓?xí)這門課程。
http://dict.hjenglish.com
Why then, if communication is vital to our survival as individuals and to the institution of marriage, are we often so bad at it?
為什么會(huì)這樣，溝通對我們作為個(gè)體的生存和婚姻制度是否如此重要，我們通常在這方面如此糟糕？

You really have to work at it." Junior Achievement says three hundred eighty-five thousand volunteers support its programs around the world.
If you take one of those individual grains of sodium chloride, look at it carefully, you will see the edges look like this.
如果你拿起,氯化鈉晶體的一粒，仔細(xì)觀察，你可以看到這樣的棱角。
麻省理工公開課 - 固態(tài)化學(xué)導(dǎo)論課程節(jié)選
And yeah, it takes a long time to get good at it. A lot of fitness, too. A lot of working out.
要想劃得熟練需要時(shí)間。體能也要好。再加上大量的鍛煉。
MIT賽艇選手 - SpeakingMax英語口語達(dá)人

Now Assouline is at it again, in search of investors for a new development in China.
FORBES: Fish and Game