重点讲解：
1. a shot/stab in the dark
瞎猜；盲干；
eg. Every single one of those inspired guesses had been shots in the dark.
所有那些凭直觉的猜测都是无根据的瞎猜。
eg. Does he know about the party or just take a shot in the dark?
他知道派对的事，或者只是在瞎猜而已？
2. happen to sb.
（尤指不愉快的事）发生（在…身上）；（某人）遭到；遇到；
eg. You can't sleep out; anything might happen to you.
你不能离家外宿，你有可能出事的。
eg. She fall to brood about what have happen to her.
她开始沉思默想自己的遭遇。
3. no longer
不再；已不；
eg. The construction industry is no longer as depressed as it was.
建筑业不再像以往那样萧条了。
eg. The footbridge over the river is no longer in use.
河上的人行桥已不再使用了。
