back at (something or some place)

1. Having returned to some specific building. We should be back at our apartment by 9 PM. I wonder if Tom and the kids are already back at the house.

2. In some specific building that one has already left. Dang it, I forgot my briefcase back at the office.

3. Having returned to some activity, especially school or work, after a hiatus. Sarah's been out sick for a week, but she said she should be back at school on Monday. I really found it hard being back at work after such a long vacation.

*back (some place)

returned to some place; at some place again. (*Typically: be ~; get ~; arrive ~.) I can't wait till we get back home. When will we get back? Is it much farther?

*back

(at someone) repaying someone for a bad deed. (*Typically: get ~; have ~.) Tom called me a jerk, but I'll get back at him. I don't know how I'll get back for her insult, but I will.

McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

back

n. one’s support or second in a fight. (From back-up.) I need a back I can depend on.

McGraw-Hill's Dictionary of American Slang and Colloquial Expressions

See also:

back
echo back to
be/go back to square one
back home
come back and see us
back to square one
back door
a while back
be back on the rails
burn one's bridges/boats, to

词组	back at (something or some place)
释义	back at (something or some place) back at (something or some place) 1. Having returned to some specific building. We should be back at our apartment by 9 PM. I wonder if Tom and the kids are already back at the house. 2. In some specific building that one has already left. Dang it, I forgot my briefcase back at the office. 3. Having returned to some activity, especially school or work, after a hiatus. Sarah's been out sick for a week, but she said she should be back at school on Monday. I really found it hard being back at work after such a long vacation. See also: back Farlex Dictionary of Idioms. back (some place) returned to some place; at some place again. (Typically: be ~; get ~; arrive ~.) I can't wait till we get back home. When will we get back? Is it much farther? back (at someone) repaying someone for a bad deed. (Typically: get ~; have ~.) Tom called me a jerk, but I'll get back at him. I don't know how I'll get back for her insult, but I will. McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. back n. one’s support or second in a fight. (From back-up.) I need a back I can depend on. McGraw-Hill's Dictionary of American Slang and Colloquial Expressions See also: back echo back to be/go back to square one back home come back and see us back to square one back door a while back be back on the rails burn one's bridges/boats, to
随便看	no sweat nosy nosy parker not Not! not a bad sort not a bean nota bene not a bit not a bit of it not a bit of it! not able not able to call (one's) time (one's) own not able to call time own not able to get for love or money not able to get (something) for love or money not able to go on not able to help not able to help it not able to hold it (in) not able to make anything out not able to make anything out (of something) not able to make head nor tail (out) of (something) not able to make head or tail of not able to make head or tail (out) of (something)