The noise signal of passing car is gathered through microphone array, and processed off line with array signal processing theory , thus traffic volume and up and down vehicles can be estimated accurately.
提出了将车辆个数估计转化为阵列信号处理中的信号源个数估计，进而得到道路交通量；将上下行车辆的数目的估计转化为阵列信号处理中的波达方向(DOA)变化估计，进而得到车辆上下行数目估计。
The up train(ie The train to London)leaves every hour.
上行火车（开往伦敦的火车）每小时一班.
The up train leaves every hour.
上行火车每小时一班.
Trains run on a railway track.
火车在铁路轨道上行驶。
She had to walk to the station and so lost her train.
她只能步行去车站,因而没赶上火车。
Smoke rises from the engine as the train climbs a hill.
当火车向着山上爬行时，烟从机车上冉冉升起。
The train labored up the hill.
火车艰难地向山坡上行驶。
high-speed rail technology; train is suspended on a magnetic cushion above a magnetized track and so travels free of friction.
高速火车的技术；火车在磁化轨道上悬浮并高速运行。
(British) the platform in the cab of a locomotive on which the engineer stands to operate the controls.
（英国）机车上的司机室里的一块平台，火车司机就站在上面对火车的运行进行操纵。
Stop! Don't jump on the train!
站住！不要上火车！
The conductor reminded the passengers not to leave their luggage behind when they got off the trains.
列车员提醒旅客们下火车时别把自己的行李忘在车上。
The conductor remained the passengers not to leave their luggage behind when they got off the train.
列车员提醒旅客们下火车时别把自己的行李遗忘在车上。
sound the wheels of a train,ie by striking them
敲击火车车轮进行检查.
`But, in order not to exceed it, you must jump mathematically from the trains upon the steamers, and from the steamers upon the trains again.'
“要想不超过八十天，必须极准确地一下火车马上就上船，一下船马上又上火车才行啊
"Step in quickly, the train will be off in a minute. "
快上车!火车就要开了
Step in quickly, the train will is off in a minute.
快上车!火车就要开了。
The train rammed the car broadside.
火车的一侧撞上汽车。
an unlovely ride to work on a crowded train.
在拥挤的火车上的工作是一段令人厌烦的旅行。
a building from which signals are sent to control the movements of railway trains.
铁路上用来发信号以控制火车运行的地方。