I tracked down the printer who did the original我找到了最初印请帖的印刷商
track down:跟踪追捕; 追查
It took the police several days to track down their quarry.
警方用了几天时间追查到案中目标。
I finally track down the reference in a dictionary of quotation.
我终於在引语词典中查到了那段引文。
Must have slipped her mind.她肯定是忘了
slip one's mind:忘记
He was supposed to have brought home a loaf of bread, but it slipped his mind.
他本来想带一条面包回家的,可他把这事给忘了。
常用短语:
slip up失误
slip away逃走
He can catch up.他待会就来
catch up:赶上
She walked too slowly to catch up with us.
她走得太慢,跟不上我们。