couple: n.1.一对,一双。2.配偶,夫妇,未婚夫妻,一对舞伴。3.〔口语〕交媾;【物理学】力偶;电偶;【天文学】联星。4.〔口语〕(少数)几个,两三个。短语和例子an old couple老两口儿。 a married couple夫妇。 a pack of 20 couple二十对的一群猎犬。 a thermo-electric couple温差电偶。 a couple of
Transportation of dangerous liquid chemicals . road tankers with top refuelling and discharging . internal cut - off and safety valves coupling and control 危险液态化学制品的运输.顶部注入和排出的道路罐车.内部关闭阀和安全阀