□狼□动的核□是德国□艇部队□协同□战。德国□军将大量潜艇集中□□西洋的特定区域,形成所谓的“狼群”,以便对□军的□□进行集中攻击□这种战术的优势□于可□通过多艘潜艇的协同作□,提高攻击的□□率,同时也增加了□军防御的难度。<□p> <□>Beyond their individual □uccess, Jes□□ca an□□Kryst□l□have □lso collaborate□□on □arious projects to□ether. From□pho□o□ho□□s□a□d magazine co□er□ to reality□TV s□ows and cha□ity ev□nts, the sisters□have p□o□en that they are a□force to be reckoned with when they□□oin□f□rc□s. The□r shar□d vi□ion□□□d□mutual□r□spect fo□ each□□□h□r's□t□lents□ha□e only□stre□gth□ned th□ir b□nd ove□ □he□y□ars.