未被攔阻

We had to call a plumber to unblock the drains. 我們得叫管道工來通一通下水道。

The state or quality of being open, expanded, or unblocked. 開放，不閉合公開的、展開的或打開的狀態(tài)或性質

We have to call a plumber to unblock the drain. 我們得叫管工來通一通下水道。

Unblock the pipe and run the dirty water through. 把堵賽的管子通一通，讓臟水流過去。

SS7 Route Resumed-SS7 Trunk Group IS Unblocked. 路由點有效，中繼組恢復正常。

When the pipe was unblocked, the water drained out. 一打開水管, 水就流了出來。