Some roads have become impassable at certain times of the year.

有些道路在每年特定的时期无法通行。

Many roads leading to some of the worst hit areas remain impassable.

数条通往受灾最严重地区的道路仍无法通行。

The dogs also train on helicopters because roads might be impassable in a disaster.

灾难过后道路可能会无法通行，因此搜救犬还需要接受直升机上的相关训练。

In winter, it's cut off by snow. All roads in and out are impassable.

冬天，这里被冰雪覆盖。进出之路尽被阻隔。

The main road between Port au Prince and here was impassable as early as yesterday.

在昨天以前，太子港和这个地区之间的主要道路还不能通行。

Scores of area roadways are impassable or damaged by flooding across the Rocky Mountain foothills of Colorado.

洪水席卷科罗拉多州落矶山脉丘陵地带，许多地区的道路已经无法通行或者是被洪水破坏。

Bermudan police administer says many roads are impassable after Hurricane Gonzalo crossed over the British territory overnight.

百慕大的警察局长称，飓风Gonzalo在一夜之间横扫英国领土，导致许多道路无法通行。

Save the Children said roads were impassable because of the rising flood waters, and helicopters have been grounded.

救助儿童会表示，一些道路已经完全无法通行，因为洪灾造成水位上升，许多直升机也停飞了。

It was surrounded by almost impassable forests, and Alfred fortified the place so that it could not well be taken.

四周都是密林，难以通过，加之阿尔弗雷德构筑了防御工事，因此易守难攻。

Wild grapes running riot in hundreds of miles of all but impassable jungle.

野葡萄在数百英里几乎无法穿越的丛林中肆虐。