重點(diǎn)講解：
1. part of 一些；部分；
Part of the roof has caved in.
屋頂有一部分塌了下來(lái)P*om*XP*lUk^J22jf55V。
2. bring down 降（價(jià)）；
We aim to bring down prices on all our computers.
我們打算降低我們所有計(jì)算機(jī)的價(jià)格rajR6^,mTIl。
3. go missing 失蹤；
Children often go missing in places of high population density, such as shopping malls, railway stations and amusement parks.
兒童容易在購(gòu)物商場(chǎng)、火車站和游樂(lè)園等人口密度高的場(chǎng)所走失J&#UW5XaB..4@w%^J--。
4. be willing to do sth. 樂(lè)意的；愿意的；
I am willing to admit that I do make mistakes.
我愿意承認(rèn)我確實(shí)會(huì)犯錯(cuò)iUkNgSzoJstCf]#]。