木头的纹理清晰可见。

The wood ___grain is clearly visible.

这块木板的纹理很清晰。

The ___grain of this wooden board is very clear.

我早餐喜欢吃全麦面包，因为它含有丰富的谷物。

I like to eat whole wheat bread for breakfast because it contains nutritious ___grains.

面包屑上还残留着几粒盐。

There were still a few ___grains of salt left on the breadcrumbs.

这颗钻石的重量精确到每一克。

The weight of this diamond is measured to the nearest ___gram.