高考真题例句：That energy can be immediately used to accelerate (加速) the vehicle or, in the case of the Barcelona subway system, sent along cables to supply electricity for the station or for electric car chargers. ——2026·全国Ⅱ卷这些能量可以被立即用来给车辆加速；或者，以巴塞罗那地铁系统为例，这些能量会沿着电缆输送出去，为车站或电动汽车充电站提供电力。高频搭配：generate electricity 发电
2. expectation /ekspekˈteɪʃ(ə)n/ n.预料；期望
高考真题例句：Many scientists shared the commonsense expectation that as permafrost melted, lakes would at first expand with meltwater flowing into them. ——2024·天津许多科学家都抱有一种符合常理的预期：随着冻土的融化，由于融水不断流入，湖泊在初期会随之扩大。高频搭配：meet expectations 达到期望beyond expectations 超出预期
3. helpful /ˈhelpfəl/ adj.有帮助的，有益的
高考真题例句：They were calm and very, very helpful. ——2026·全国Ⅰ卷他们镇定，而且非常非常乐于帮忙。高频搭配：be helpful to 对……有帮助be helpful in doing sth 有助于做某事
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