慢速英语:Solar-powered Plane Aims for Round-the-World Flight

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1. improve vt.提高
例句：We can improve quality, reliability, and durability.
我们可以提高质量、可靠性和耐久性。

2. design vt.设计; 计划
例句：Now we’re ready to design. 
现在我们准备开始设计。 

3. assistance n.帮助，援助
例句：More than half requested employment assistance.
超过一半以上的人请求就业帮助。

4. efficiency n.效率，效能
例句：The fuel efficiency is remarkable.
燃料的效率非常出众。

5. appliance n.器具，器械
例句：Virtually any appliance is going to be online.
几乎一切设备都会被连入网络。