◆ not…until… 直到……才……
扣项链 clasp/fasten one's necklace
A：Your necklace fell off.
你的项链掉下来了。
B：Every time I try to clasp my necklace, it falls off! I think I should take it to the repair shop tomorrow.
我每次试着扣项链的时候，它都会掉下来！我想明天我得把它拿到维修店里修一修。
clasp /klɑ?sp; kl?sp/ v. 扣住；扣紧；钩住 n. 扣环
把项链解开 unfasten one's necklace
A：You really ought to unfasten your necklace and put it in the jewelry box before bed.
你睡觉前真应该先把项链解开放到首饰盒里。
B：I have a bad memory. I often forget such trivial things.