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- 当一束光线穿进暗淡的房间时，我们可以看到空气中有许多小颗粒在飞舞。
We can see many molecules flying in the air when a sunbeam penetrated the dark room.
- 将地上的谷粒捡起来。
Pick up the grains on the ground.
- 谷粒禾谷类作物的一个颗粒
A single grain of a cereal plant.
- 在风天，我们能看到无数沙粒。
We can see numberless grains of sand in a windy day.
- 他们正在用打谷机给小麦脱粒。
They are separating the grains from wheat with a threshing machine.
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