How can i import simple_links and downloadable_links of downloadable products?

i want to import downloadable products, which have multiple sample_links and downloadable_links, My Magento app is multi store site. like i have 7 multistore/multilingual, each product belongs to different or same stores the title and description of each product is different with each store. so once import a single product i am doing like this: sample code

So how can i add the sample_links and downloadable_links for downloadable products?