The 3600m-long tunnel has 4 lanes. Its average daily traffic flow is expected to reach 50000 vehicles.

武汉长江隧道全长3.6公里，双线4车道，预计日通行能力为5万辆。

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Background: a nearly 3-mile-long bridge dips into this6-mile-long tunnel in a region prone to earthquakes.

背景材料：在地震易发区，一条近3英里长的桥钻入6英里长的隧道。

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The 1200 meter long tunnel is about 5 meters high and 4 meters wide. It is located in the Henan Province of China.

隧道1200米长，5米高，4米宽，位于河南省。

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So does one long tunnel, just wide enough for one boat to get through.

VOA: standard.2010.04.29

Sometime it will just stop in the middle of a tunnel for however long.

有时候，地铁会久久地停在隧道的中间。

纽约的交通手段 - SpeakingMax英语口语达人

This meant creating a tunnel more than one-and-one half kilometers long.

VOA: special.2009.02.21

The Department of Transport said a sale will only be made to "a public body" able to take on the maintenance of the mile-long tunnel.

BBC: Harecastle tunnel offered for sale by the government

For Bush and Prana Biotechnology, the new data is a sign that there might be a light at the end of the long tunnel they are slogging through.

FORBES: Rethinking Alzheimer's

The central aisle of an airliner, the back seat of a car (stale popcorn crammed into cushion cracks), a coal mine, a hospital waiting room, a long tunnel in which a hot breeze blew first in one direction and then the other.

NEWYORKER: Ziggurat