Many of the indigenous insects are needed to pollinate the local plants.

需要很多种土生昆虫给当地植物授粉。

《柯林斯英汉双解大词典》

Many garden plants need butterflies to pollinate them.

许多园林植物需要蝴蝶授粉他们。

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And without honey bees to pollinate crops, our food supply is in danger.

如果没有这些蜜蜂给农作物授粉，我们的食物供给将会受到威胁。

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"There are honey farmers, but using hives in the field to pollinate crops is not at all common in India, " he said.

BBC: 'Pollination crisis' hitting India's vegetable farmers

As a teenager, Mr. Alvarez joined the Sonoma County Beekeepers' Association and learned that local farmers would pay beekeepers to pollinate their crops for them.

WSJ: Hector Alvarez: How a Beekeeper Builds Buzz | Creating

In industrialised nations, such as the US and in Europe, many farms employ the services of commercial hives to pollinate fruit trees and food crops, and ensure they harvest adequate yields.

BBC: 'Pollination crisis' hitting India's vegetable farmers