teased them into thin strands（一缕） of meat.
the five-year projecttook cells from organic（有机奶牛） cows,cultured（培养） them in a nutrient solution（营养液） to develop muscletissue（肌肉组织）,and then teased them into thin strands（一缕） of meat.
tease是取笑的意思.这个tease into 整句话是 teased them into thin strands（一缕） of meat.