spark n. 1.火花;火星。 2.(钻石等的)闪光;(目光的)闪耀。 3.生气,活力,(才智的)焕发。 4.〔美国〕小钻石;小宝石。 5.〔通常用于否定句〕一丝,一分,一点点。 6.【电学】电花,瞬态放电。 7.【机械工程】(内燃机火花塞的)控制放电装置。 8.〔pl.〕〔口语〕(船上的)无线电技术员。 A single spark can start a prairie fire. 星星之火可以燎原。 There was a wild spark in his eyes. 他的两眼炯炯发光。 The vital spark in him makes him an artist. 他的生气勃勃的活力使得他成为一个艺术家。 fairy sparks 磷光,鬼火。 a spark of wit 才气的焕发。 the vital spark=the spark of life 生气。 as the sparks fly upward 合乎道理,的确,不错。 have not a spark of interest 毫无趣味。 strike sparks out of sb. 激发某人的聪明才智。 vi.,vt. 发火花,飞火星儿;使闪耀,使闪光;用眼神表示(喜悦等);〔美国〕鼓舞,激励。 Joseph is a player who can spark his team to victory. 约瑟是个能激励他的队员取胜的运动员。 The discovery sparked us to further study. 这个发现鼓舞我们作进一步的研究。 n. 愉快的年轻人;翩翩少年;纨绔子弟,花花公子;求爱者;情郎。 vi. 讨好女人,追逐女性。 vt. 〔美国〕求爱,求婚。
So the railroad will buy the spark arrestor 所以铁路将购买阻火器。
Railway transport equipment . spark arrestor plates for braked wagon wheels 铁路运输设备.车厢制动轮的防火花档板
The railroad will realize that it can save this $ 100 cost by investing $ 50 in a spark arrestor 铁路将意识到,它可以通过投资50美元购买阻火器来省下这100美元。
The farmer will realize that he can save this $ 100 cost by entering into a contract whereby he pays $ 50 ( plus some extra enducement , say $ 51 total ) to the railroad in exchange for the railroad installing the spark arrestor 农民将会意识到,他可以支付50美元(加上某些额外的费用,假定共计51美元)给铁路,作为交换,铁路将安装50美元的阻火器。
百科解释
A spark arrestor is any device which prevents the emission of flammable debris from combustion sources, such as internal combustion engines, fireplaces, and wood burning stoves.