out of earshot
Hey, John. John.
喂，约翰，约翰
—Save your breath! He’s out of earshot.
省口气吧！距离太远，他听不见。
＝超出能听到的距离

be on the right track
You are on the right track. I just think you need to narrow the topic down.
你大方向正确，我只是觉得你有必要缩小论题范围。
＝在正确的轨道上，方向正确

be on to something
How's your work going?
你的作业怎么样了？
—I think this time I am really on to something.
—我觉得这次摸到门道了
=认识到重要意义，会产生重要结果

OMG sweet! This post kicks ASS!

kick ass!
hot shit!
More to add to it.

be out of it
Pete's really out of it these days.
皮特这些天真是魂不守舍
Yeah, I know. Ever since he met Ann, he's been in another world.
可不是。自从认识了安，他就像活在另一个世界里
＝魂不守舍

be out of one’s mind
He's got to be out of his mind.
他一定是疯了
＝失去理智.

be out of this world
Have you tried Susan's apple pie?
你尝过苏珊做的苹果派吗？
I got the last piece. And it was out of this world.
我吃到了最后一片。真是绝世美食。
＝absolutely wonderful.

be second to none
Mary Goddard's newspaper was second to none among the colonies.
玛丽·康拉德的报纸在殖民地首屈一指。
＝the best，首屈一指，无出其右，无与伦比

be quite a person
I hear your older sister is on the Olympics team and on the honor's list. She must be quite a person.
听说你姐是奥运队的，同时还是优秀学生。她真了不起。
＝了不起的人物

ding，thread starter

be set
What are you worried about? Just ask your professors to write letters of recommendation for you, and you’ll be set.
你担心什么呢？叫你教授们写几封推荐信，就万事大吉。
＝be OK

be that
For some students, these part time jobs could lead to full time work after graduation, as they may offer experience in their own field, be that finance, marketing, or even management.
对某些学生而言，这些兼职工作可能导致毕业后的全职工作，因为兼职工作可以提供他们自己专业领域的经验，无论是金融、营销，还是管理专业。
＝no matter whether that is

be the rage
By the 1930', big dance bands were the rage.
到了二十世纪三十年代，大型舞蹈乐队风行一时。
＝风行一时.

更正：the 1930's