We eat meat because it contains vitamins.
因为肉类含有/包含维生素,所以我们吃肉.
= We eat meat because there are vitamins in it.
因为肉里面有维生素,所以我们吃肉.
We eat meat because it contains vitamins.
因为肉类含有/包含维生素,所以我们吃肉.
= We eat meat because there are vitamins in it.
因为肉里面有维生素,所以我们吃肉.