Hence, a small percentage of total income is enough to cover foodexpense.
这样一来总收入的一小部分就足够用于食物花销。
2
In fact, these items make up the second largest foodexpense, ranking behind only the combined expenses for meat, fish, poultry and eggs.
事实上,他们是食物消费中第二大种类,仅次于肉、鱼、家禽和鸡蛋的消费。
3
Therefore, a begging nestling that secures food at the expense of its siblings might actually leave behind fewer copies of its genes overall than it might otherwise.