1. They barter grains for cloth.
    他们用谷物换布。

2. The hen pecked up the grains on the ground.
    母鸡啄起地面上的谷粒。

3. "This added iron supplements the small amount that naturally occurs in grains.
    "这些增加的铁补充了谷物中自然含铁量的不足。