未被拦阻

We had to call a plumber to unblock the drains. 我们得叫管道工来通一通下水道。

The state or quality of being open, expanded, or unblocked. 开放，不闭合公开的、展开的或打开的状态或性质

We have to call a plumber to unblock the drain. 我们得叫管工来通一通下水道。

Unblock the pipe and run the dirty water through. 把堵赛的管子通一通，让脏水流过去。

SS7 Route Resumed-SS7 Trunk Group IS Unblocked. 路由点有效，中继组恢复正常。

When the pipe was unblocked, the water drained out. 一打开水管, 水就流了出来。