At present trains in most countries use oil-fired boilers instead of coal-fired ones.
At present trains in most countries use oil-fired boilers instead of coal-fired ones.
现在火车在大多数的国家使用烧油的锅炉，代替烧媒的锅炉。
At present trains in most countries use oil-fired boilers instead of coal-fired ones.
现在火车在大多数的国家使用烧油的锅炉，代替烧媒的锅炉。