严密地关闭

tightly shut

严密的火网

tight net of covering fire

小说结构严密，文字流畅。

The novel is tightly structured and the prose flows.

使党的组织更加严密

make the Party's organization even tighter

小道防守严密

paths are closely guarded

今天的岗哨布置得很严密。

Today, the guards are tightly deployed.

消息封锁得很严密。

The news is tightly blocked.

严密的计划

careful plan

严密考虑

careful consideration

严密监视敌人

keep a close eye on the enemy

在严密的控制下

under tight control

经过严密审查

after strict censorship

严密规章制度

tighten the regulatory system