n. 气体, 汽油, 瓦斯
The railroads used red gas lights at night to signal stops and green gas lights during the daytime.
六级 · CET-6 2025年12月 第3套
Knight installed a similar gas light, semaphore system near London's Westminster Bridge in December of 1868.
六级 · CET-6 2025年12月 第3套
A gas leak caused one of the signal lights to explode on its police officer operator within a month of being installed.
六级 · CET-6 2025年12月 第3套
asserted that 51 percent of global greenhouse gas emissions come from rearing and processing livestock.
六级 · CET-6 2025年6月 第2套
greenhouse gas emissions in 2016 were electricity production (28 percent of total emissions), transportation (28 percent) and industry (22 percent).
六级 · CET-6 2025年6月 第2套