wǎng / shàng / pī / liàng / gòu / mǎi / shí / pǐn / tōng / cháng / bǐ / dān / jiàn / gòu / mǎi / pián / yi

网上批量购买食品通常比单件购买便宜。

Buying food in bulk online is usually cheaper than buying it item by item.