VOA慢速英语:Supercharged Plants May Mean More Crop Production(翻译)

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短语讲解：

1. Scientists can speed up the growth by modifying, or changing, the structure of plants’ genes.

speed up （使） 加速; 开快车; 加紧
例句：We will be able to speed up that day.
我们要促使这一天的来临。

2. Researchers say demand for food is expected to increase up to 70 percent by the middle of the century.

be expected to 被期待做某事; 有望做某事; 期许
例句：I shall be expected to shell out the money for the party.
我将要支付这个集会的费用。

3. That is why they are looking for ways to improve photosynthesis and make plants more productive.

look for 寻找（某人或某物）; <口>找（麻烦）
例句：He should early look for job.
他早该找工作了。