蜜蜂在花园里给花朵授粉。
Bees ___pollinate the flowers in the garden.
园丁用刷子小心翼翼地给这些花朵授粉。
The gardener carefully ___pollinated these flowers with a small brush.
为了增加苹果产量，工人们正在果园里进行人工授粉。
Workers are ___pollinating the apple trees by hand to boost the yield.
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