a mountain range in the eastern United States extending from Quebec to the Gulf of Mexico; a historic barrier to early westward expansion of the United States

The animation shows a series of thunderstorms coalescing as the fast-moving front travels from the Appalachians toward the Mid-Atlantic.

该动画展现了一连串的雷暴聚结由阿帕拉契山脉向大西洋中部快速移动。

They are found in the Appalachians and West Coast. It is the state flower of two US states, West Virginia and Washington, and is quite common in Great Britain as well.

在阿巴拉契山脉和西海岸都有他们的蹤影，他们也是美国西弗吉尼亚和华盛顿两个州的州花，而且在英国也很是常见。

The Appalachians run slightly from the northeast to southwest and the Rocky mountains run slightly from the northwest to southeast.

阿巴拉契亚山脉有点西南-东北走向，而落基山脉微呈西南-西北走向。

The Appalachians run through thirteen states.

山脉穿经十三个州。

I pushed through some dreary weather in Michigan and Ohio, climbed the roller-coaster foothills of the Appalachians and battled traffic and chewed up roads as I entered the city.

路上我熬过了密歇根州和俄亥俄州的阴沉天气、像坐过山车一样翻越了阿巴拉起亚山脉的山麓、忍受了进入市区后拥堵的交通和蜗牛般前行的无奈。

In the east, canopy heights generally decrease along a gradient from the Southern Appalachians (including the forests of the Great Smoky Mountains) to Maine (far northeast corner of the country).

在东部，森林从南阿巴拉契亚山脉(包括大烟山脉的森林在内)向东北延伸到缅因州(直抵边境)，树冠高度明显(比西部)低得多。