4. increase vt. 增加
例句:Experts believe self-driving cars will increase productivity.
专家认为,自驾汽车会提高生产力。
5. invest vt. 投资; 花费
例句:We dont invest in gold.
我们不投资黄金。
6. fuel n.燃料
例句:The fuel efficiency is remarkable.
燃料的效率非常出众。
短语讲解:
1. European airplane maker Airbus plans to have new passenger airplanes by the end of the year.
by the end of 到为止
例句:Figure out your travel plans by the end of .
底的时候就制定出明的旅行方案。
2. 3-D printing also helps when parts are no longer available.
no longer 不再,已不
例句:Quality is no longer an issue.
质量不再是个问题。
3. We are investing a lot of money in aerodynamic improvement, in material, in noise reduction, etc., but 3-D printing is probably the area with the highest gain over time, Krein said.
a lot of 许多的; 诸多
例句:A lot of whats changing now is subtle.
许多变化都非常微妙。
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