Examples
tā她gào su告诉wǒ men我们dào lù道路bèi被fēng bì封闭le了。
她告诉我们道路被封闭了。
She told us the road was closed.
用户应该拥有硬件和软件的使用自由，操作系统应该是开放的，而不是封闭的。
A user should have freedom with respect to both hardware and software. An operating system should be open, not closed.
中国乒乓球队进行了一个月的封闭式冬训。
The China National Table Tennis Team had a month's closed training in winter.